Using Cheap Paint
If you catch yourself eyeing a discount brand, remember, cheap paint is no bargain. You'll need more of it to cover the same area. And since it won't cover well, you'll have to spend more time to apply extra coats. And after all this, it may not last as long as better quality paint.
Buying a Cheap Roller Cover
We know. You hate cleaning rollers, so you figure you'll just buy a cheap cover and throw it away. Well, guess what? If your time is worth anything, a cheap roller cover is the most expensive tool you can buy. Cheap covers don't hold enough paint, shed fibers on your walls, and in general are a pain to use. We prefer lamb's wool roller covers, but any top-quality roller cover will work fine.
Buying Cheap Masking Tape
Don't scrimp on masking tape. More expensive tape is easier to put on, easier to remove and better at sealing out the paint. There are many specialized types of tape to choose from to suit your task. Some can be left on longer. Some are meant for outdoor use. And others have less aggressive adhesive so you can mask off delicate surfaces. Choose the most appropriate one, but don't buy the cheap stuff.