How do you communicate with the Gods?

Libia, Cirene (sito archeologico), Tempio di Zeus
(Photo credit: Wikipedia)

I’m a Polytheistic pagan/Druid and have recently started out with communicating with Deities. I’d like to know how others go about this, and some guidelines for my practice.

How do you speak to the Gods? Is ritual needed? Do you do it in a specific place?

How do you know you are getting through with your communication? Finally, what is the response like?