Trade Secret #4

Washing brushes after use. If your brush is not getting dried lumps on the side of the bristles after a day of painting you can avoid washing the brush by carefully wrapping the bristles with a cling film used for cooking or a piece of thin (1 mm) plastic sheet used for covering furniture. Be careful to push out the air bubbles, then put the brush in a cool place until the next day.
If you need to wash the brush do it thoroughly, until no more discoloured water is coming from the bristles. I usually dab the brush against the bottom of the sink with the tap running.
Spin the brush in you hands until the bristles are damp, then smooth out the bristles as the brush will conform to the shape you leave it in. Lay it on a rag and you're done.