We haven't done this for a long time, so let's see if we can come up with some helpful hints to share--I love learning new things and hopefully they may be helpful to the newbies too.
Here's a couple to get us started:
1. The handle tip of your brush makes great dots. Be sure to dip it in the paint each time for dots all the same size. Dip it only once to make a series of dots that go from big to small in size.
2. Alcohol is a painter's friend. Use it on a q-tip to remove dried paint. Use it to soak brushes to remove paint that has built up or dried in the brush also.
3. Never leave your brush sitting on the bristles, store them by hanging them or with the bristles pointing up.
I'll stop there for now--will try to think of more to add later.