Resources that I've stumbled on that you might find helpful

Rain Harvesting Books

These rainwater collection books are a valuable reference and definitely worth reading.

Publications & Guides for Rain Collection

Downloadable rain harvesting guides packed with information and practical advice.

DIY Projects / How To Information

Projects, instructions, plans and other information for the DIYer.

Rain Capturing Videos

Videos on constructing rain collection systems

Rainwater Harvesting Sites

These are sites that I have found helpful when researching rain collection.