Watercolour is a wonderful medium, but it does sometimes seem to have a "mind of its own," refusing to do quite what is required. The keys to success are good planning, constant practice and a thorough understanding of your materials, so if you are new to painting, start by trying out some of the techniques and projects in this book as well as experimenting with different colour mixes and types of paper. 

She also includes tips on presenting your finished work in a professional way, building a portfolio, and getting it seen.