In addition to the right paint brush, you need the right paint roller. Rollers allow you to work faster than with brushes alone. For large areas of shingles, stucco or brick, opt for a 9-inch (23-centimeter) roller with a half-inch nap. For narrow spaces, or for applying to large areas of siding, a 7-inch (18-centimeter) roller will be a better fit [source: The Family Handyman].
Dampen the roller before dipping it into the paint. This will cause it to absorb less, limiting wastage. If you're working with latex paint, wet the roller with water. For oil-based paint, skim the roller through paint thinner and use a 5-in-1 tool to remove the excess [source: McMillan].
To keep rollers from drying out between coats, cover them in plastic wrap or place them in a plastic bag. If you're storing them overnight, put them in the refrigerator. Not only will you save time by not cleaning them, but when it's time to use them, they'll be ready to go. The same technique works well for paintbrushes, too [source: Fontana].