What a great idea for a thread. I'm in the same situation with three small kids.
I've done a bit of painting before. When choosing colours I cut the sample out of the book and match it up to furniture/curtains that way.
There's a green tape called 'gorilla tape' for protecting the edge of wallpaper, skirting boards etc.
If you are stopping for a break, a coffee, put the brushes in a plastic bag and fold down the end.
Email yourself a list of what colours went on which room. You will forget.
It takes ages. Schedule more time than you expect.
Make sure you have easy prepared meals for that week.
Do the prep the day before you do the painting.
That's it from me. Oh, except to say if its kids rooms then those big wall stickers are great. When they're older you just replace them.
Anyone know an easy approach to wallpapering, especially patterned wallpaper.