[Syd Thrift]

I go...

1 - best speed on the team as long as they don't totally suck / ideally a high OBP
2 - good avoiding Ks, ideally a left-handed hitter (to "hit behind the runner"), try to get a middle infielder to keep them all from being at the bottom of the order
3 - best hitter for average
4 - best hitter for power
5 - 2nd best power hitter, although sometimes this can be a 2nd leadoff spot
6, 7 - next worst hitters
8 - usually the catcher, unless the catcher is a really good hitter (but they have to be exceptional, as the backup C will usually be pants)

Probably the most important thing if you're interested in stats is to get your best hitters early in the order because they'll have more plate appearances. If you're using a no-DH league the leadoff hitter has a kind of severe reduction in how much his power matters because not only is a homerun only worth 1 run if he leads off a game (whereas it can be worth a lot more down in the order), there's also a much, much greater chance that he'll come up with empty bases later in the game since he's hitting after a .150 hitter.

All of this being said, unless you do stupid, stupid things, like put your worst OPS player leadoff, your 2nd worst 2nd, and so on down the list, the difference between a bad lineup and a good one is like 1 win a year. So my main advice is, don't take too much time worrying about this particular thing except to immerse yourself in the game / keep your players happy / etc.