Ensure all water or mineral spirits are dried from your brushes or rollers before resuming painting, as the residual moisture may thin the paint on the brush or roller. Remove any masking tape as soon as possible after painting, and use only tape designed for painting. Wide tape can be lapped over carpets for protection, when painting baseboards. Poke some small holes in the rim of your paint can, so the paint will drain back into the can instead of filling the rim - which makes resealing the can very difficult. Don't buy cheap paints or cheap tools.
Cheap paints have poor spreadability and reduced coverage.
Cheap brushes and rollers loose bristles and leave lint. An extension pole will allow you to make longer strokes and maintain more wet edge, and reduce strain when painting ceilings. Home Reference Book by Carson Dunlop 1999-2000. Optimized for Netscape 4, Explorer 4 or better at 800x600 resolution.