What is the best way to finger pick?

[domportera]

personally I use two or three fingers, and move my thumb down for each time I switch strings. For example, if I play on the E string my thumb is on the pickup, and if I play on the D string my thumb is on the A string. Also, if I half to do walks or if there are very quick notes on a string above, I'll just keep my thumb where it is and rest my finger on the string below it after I pick (I don't know how clearly I conveyed that, but I don't know how else to explain it, sorry!)
But anyways, I haven't taken lessons and I want to know, what do you think is the most efficient way of finger picking in general?
And also, what about for songs by Iron Maiden and Dream Theater?

[Muzoid]

Seems like you're on the right track....that's how I do it (I play some Maiden) a few main places to rest my thumb...pup, strings, neck joint (for thuddy tones, and mwah).