I added an effect to a clip; now I want to remove that effect and I don't see how to do that. I've done a bunch of other things since adding the effect that I don't want to undo.
Rider, i would suggest getting some video tutorials from Lynda.com
I specially loved the FCP and PRemiere Basics and advanced techniques.
It really helped me understand how premiere works!.
Also, randomly follow some tutorials on youtube/vimeo on how to do certain effects, it will give you real world experience on how to navigate and get familiar with Premiere.
Premiere is a feature rich application unlike MovieMaker or iMovie, and learning it takes time and practice.