How to say let me know

Question

Hi,

Does anyone know if there is a good colloquial translation for "Let me know?" I find myself looking for this all the time when writing emails: "Do you want to meet at the restaurant at 5? Or whatever you want to do, let me know." I've been using avisame or me avisas (the indicative) but feel very formal when doing this, and truthfully I'm not even sure if this verb is appropriate here.

Thanks.

Answer 1

Something less formal would be "tell me": dígame. But I think the other answer is more properly and technically correct for "let me know."

Answer 2

I'd say : " Avísame."