I thought I'd put together a list of quick pointers for taking better stereos. It's not exhaustive, but hopefully it's enough to get you started.
Tag: how to make stereograms
How to Use Stereo Photo Maker: Basic Tutorial
A beginner's step-by-step guide to getting started with StereoPhoto Maker, a powerful free tool to help you make your own stereoviews.
The Stereoscopy Blog 