Sometimes "just do it" has odd wrinkles, so breakdowns of effects are nice. Maltaannon asked for suggestions and covered several in his live session Creative Breakdowns. Here's a portion of the session:
Update: Topher Welsh has more in 42 Crazy Awesome VFX Breakdowns, and KeyframeTV did some a few weeks ago. Breakdowns for many FX movies can be found most reliably on the vfxblog.