Web application usability is a moving target. The medium continues to evolve at such a rapid pace - going from basic HTML, to Flash, to AJAX, and back again.

How to make sense of it all? Here are some basic heuristics I try to stick with:

1. KISS - Keep is simple, silly
2. Use AJAX sparingly
3. Target your audience

Thes three guidelines may seem obvious, but I find it helpful for my own purposes to write them down and try to honor them when creating web applications.

NOTE: To create most web applications, I use Nexista.