Definitely agree with the dropping the pans on the counter. I refer to it as "bang the sh*t out of 'em!!
Also try the push-down method when the come out of the oven. This reduces your dome and makes the cake more dense looking .... a very pretty look!
Take a clean kitchen towel and lay it over the top of the freshly baked cake. Push down. Sometimes, on the larger cakes, I'll use a square cake plate or a square cake pan to push down on top of the towel just for even pressure. It's like it pushes out the air and compresses the cake in all the right places.
I'd never heard of this until CC, but like many of the tips I've gathered on here .... it works just like they say it will!
Edited to add: Don't know if you're a scratch or mix baker, but if using a mix, sift it. Makes a WORLD of difference in the cake texture!