This hair dryer tip would have saved me re-touching quite a few times. This site has a TON of painting tips! Must go to this site before painting anything.~in fact the site has tons of diy handyman tips PERIOD!
DIY Painting: Coffee Can Lid as Paint Splatter Shield - Paint like a pro. To make a splatter shield for when you’re painting a high surface, cut a slit in the center of a lid and pull the paintbrush through.