EDIT: I fixed the non-moving blood on the blood tutorial
I got really bored so I decided to make an effects tutorial. It covers explosions, fire, sun, lighting, rain, gunshots, and has some animation tips. I got even more bored so I added an audio search to search for
sound effects, background music, and songs from soundsnap, NGAP, and mp3.com. I also have a short animation of the sort of thing you could do with the effects in there.