Car Insurance Tips?

I am in the process of searching for a new policy my rate went up 25% with no claim I'm with Geico.

I did some research and see that most of these agents just flip your info for a quick buck or if you go with them you gotta deal with adding a middleman into the deal Is it cheaper to buy car insurance online or through an agent? – YouTube

Any advice from any seasoned experts in finding a deal on car insurance?