Don't Be Afraid of Color
You may not want to paint your ceiling yellow, but don't be afraid to deviate from plain old white. Painting the ceiling a color can make a small room seem bigger, or a room with a high ceiling seem more intimate. Plus, it's just more interesting. Ask at any full-service paint store for help in choosing complementary wall and ceiling colors, or search online for examples of rooms you like.
You Don't Need an Expensive Pole
You can buy all kinds of fancy—and expensive—extendable paint poles, but a simple wooden broom handle usually works just as well. The reasons are simple. They're cheap and light and do the job.
Use a Thick, Premium Cover
Here's a tip that applies to most paint jobs but is even more important for ceilings. You want to get as much paint on the ceiling as you can in the shortest amount of time possible while minimizing spatters. To do this, you need the best roller cover you can buy. The best choice is a 1/2-in.-nap lambswool cover. If you've never tried a lambswool roller cover, you owe it to yourself to experience the difference. And if you're worried about the cost, keep in mind that lambswool covers are easy to clean and can last a long time if you take good care of them.