Yard Guys- How do you Prep for Grass?

I was thinking of spraying grass and weed killer now, then in the spring rototill it, smooth it out, and plant grass seed.

I would do the weed killer when it becomes active, unless it already is. Let it sit to kill the roots, rototill it up, rake up all the roots and such, make a drag to pull behind your lawn tractor if you have one to smooth it out, and plant grass.