Anything I should know before turning in my vehicle after the three year lease?

I leased a 2015 Toyota Camry SE on January 31, 2015 and it's almost time to turn it in. Before I contact the dealership, is there something I should do? I was thinking of keeping the vehicle but I don't know. Is the monthly payment going to drop? Also, if I decide to turn it in, will there be any penalties for any damages? It's a white vehicle and freeway debris in California has given way to minor chips to the hood and sides of the vehicles. Also, accidentally backed up into my father in laws Ford Expedition (no claim reported) but it did leave an imprint on the back bumper.

Added (1). I'm leaning more towards keeping the vehicle. Do I get to pay less if I want to keep the vehicle?

If the car isn't in the same condition as when you leased it you could get more fees mainly the bumper one. It would be best for you to fix or replace that before turning it in.
also you want to ensure your stuff is out of the car.
the jacked up thing is if you turn it in with a bump they will charge 10X the amount as if you were to fix it yourself.

any burn holes in car any damange to anything should be replaced or you will pay!

You should read your contract and see what IT says about your end of lease.