What is the best way to memorize?
I am having a hard time memorizing all the -ar -er -ir endings for all the tense forms. Is there a good way to memorize those?
8 Answers
I find conjugation tables boring.
I used to try to memorize them, until I realized that I don't use conjugation tables when speaking.
I use learned examples, as templates. Specifically, rather than memorize a table for endings (poor context) or even for one verb (unnatural associations), I memorize one ending for several verbs.
First person singular -
hablo
trabajo
veo
hago
etc...
Do this (written and spoken) for every verb you know. Don't bother adding new verbs - that's too much at once. Study, think, feel, and internalize the words, and their meanings as (I speak, I work, I see, etc.)
A few hours later (or another day), do the second person singular for the same verbs, to fully associate the conjugated forms with their you (familiar) meanings. After a week of this, you'll get through all the present tense indicative forms. Don't forget review time, too. And preterite, imperfect, future, etc.
This is nothing more than taking each verb you know and learning conjugated forms of them as if they were completely different words. They are, after all, different words that are never really interchangable when you speak.
I've seen this general idea put to use here on SD by using flashcards in which all conjugations of a group of verbs are on the cards, either alone, or in very short sentences.
I made sure I was very comfortable with the present tense before moving on to something else. Every one of my resources deals with the present tense first before even looking at any other tenses.
Without memorizing tables, like Pesta said, and just from repetition, before long I felt very comfortable conjugating in the present tense. And, eventually, conjugating something like "conocer" in the first person to "conoco" will sound completely wrong to your ears and you'll know it is supposed to be "conozco".
Then along came the preterite. Great! A whole new set of endings to deal with. But the same thing will happen to you... after practice, it starts to get easier and easier. Eventually, something like "tocé" (conjugating "tocar" to the first person preterite) will look and sound wrong, too... and you'll know it is supposed to be "toqué".
After that, the imperfect (with only 3 irregular verbs), the future, and the conditional will be a piece of cake!
If you have an iPhone, this APP is great... you can choose the tenses you want to deal with, the pronouns you want to learn, etc. They even have an "essential" verb list to learn that will help you out the most.
I am not convinced that there is only one ''best way'' that works for everyone 
In reality we all have diffrent learning styles and what works for me may not work so well for you. There is no ''one size fits all'' since that approach has got little to do with any understanding of human nature and was just designed to make life easier for administratiors/bureaucrats! I mean, after all, does every one wear the same size pairs of shoes even though we have different size feet?
Having said that, we could all suggest a number of ideas any of which might potentially help you and you are free to experiment and see what works for you personally! 
1 Focus on one kind of ending eg ''Ar'' learn them and and practise using them for a whole week/month before moving onto another ending eg: Er
2 I would suggest that you could perhaps try and learn the er and ir endings together because they are very similar However, if learning similar things together confuses you then I would advise you to stick with one kind of ending
3 I would strongly advise you to stick with learning one tense at a time eg present tense across all the endings AR, ER and IR before moving on to a different one eg simple past or future.
4 Find a learning partner with whom you can practise the verbs together! This might help you as it has helped me immensely! Please read update below!
5 Leave learning the subjunctive until you have a fairly clear understanding of how to form and use the present, past future, and conditional indicative on a regular basis.
Update: Following a Spanish course I completed for 1 year at a GCSE/O level standard in EnglandI agreed to meet up with a friend I had met during the course He was a medical doctor from Singapore or Malaysia. He was a highly educated man more committed to learning the verbs than I was and he insspired me each time we met. We learnt the verbs together and I was saddened when I had heard from his wife that he had died. We learnt the present, future, conditional, and two past tenses together preterite and imperfect. (+ref to point number 4)
What I am saying through this is that You might also benefit from finding a partner with whom you could learn the verbs/verb endings
I hope this helps
The only way I can memorize things is by writing them down.
Do you watch the videos on this site? I know they can be overwhelmingly full of information the first time you watch them, so use the first time simply to get the general idea, then work on practicing the endings on your own. Like Feliz said, try sticking to one form at a time at first. Try writing simple sentences using different conjugations of the verbs.
For example: - (Yo) bailo la salsa. - (Tu) bailas muy bien. - (Él) baila en domingo.
and so on.
Practice this way for a bit, then rewatch the applicable video. You'll be able to pick up more of the information and you'll find it easier to fill in the blanks. Then practice more, then watch the video again. Repeat that process, one form at a time, until you feel comfortable with the endings. I think it will help!
The best way to memorize it, is by writting out the conjugations of the -ar,er and-ir verbs in sheet of paper, go through it over and over again. try to recall it every time you go through it. before you know it, your body will get use to it. try it!, it works for me.
For me, I found that saying the tenses out loud and then practicing them in sentences really helped me. I remember my Spanish profesor would just run through the conjugations of a particular word in each class. Like, Yo paso, tu pasas, el, ella y usted pasa, nostros pasamos, vosotros pasáis and ustedes pasan.
I know it's a lot of work, but that's how I do it. If I can get my mouth to say it, it's easier for me to remember it. Good luck!
There used to be an online conjugation trainer that tested you on all tenses at once for a given ending (both regular and irregular verbs). I did about 400 verbs a day for 3 months.
