Never, ever leave tape on a baseboard, doorknob, etc., for more than 24 hours after you're done painting. A dead-ringer for an amateur paint job is bits of old, yellowing masking tape still molecularly bonded to the window seven years later. Masking Paper Skip the pro stuff and use old newspapers. It's easiest to do this on a wall. This is a handy painter's secret.
Professionals use a spinner to quickly clean roller covers.
Most of the paint will fly off. Then rinse the roller under the faucet and repeat the spinning process until the roller is completely clean. Put the clean, damp roller back into its original plastic bag to protect its shape, especially the edges. You think you're saving money buying that bargain department store paint, but you're not. Prepare the surface before painting it.