tips on interior painting??

im painting my whole interior from blue to black, and wanted to ask if anyone has any tips on doing it. anyone have a good way to tape off the windsheild, or should i just pull it and reinstall? what about the rear windsheild? also,is there any way to pull the door seals without breaking the clips so i can paint on the same lines the factory did. i tried to pull a few clips and they all broke. what is the easiest way to paint the doors (underside and all)? any other tips would be greatly appreciated!!!!!!!!