This isn't so much a question as a question AND answer:
Q: I love to make forms in Splunk but if I had a cheat sheet, it would be so much easier!
A: You're in luck! There's one available here:
Q: Great! Also, where'd you get your shoes? I love them!
The cheat sheet is very cool! See also the Splunk Dashboard Examples app.
...and now there's the Splunk 6 Dashboard Examples app, with even more cool stuff. http://apps.splunk.com/app/1603/