If you paint watercolour in an impressionistic style, simplification is one of the most important aspects to consider. I'm not sure if it can be considered to be a technique but there is no doubt that simplification is something that definitely becomes easier with practice. It's not simply leaving things out or moving them around a little (although that is part of it) but more the concept of creating connections, aiming for a few big shapes rather than lots of little ones. Small disconnected shapes fight with each other for
