re: Poker & Tournament strategy: TAG or LAG?
I think you have to analyse the field you're going up against. If the field is tight, I think I would play LAG from late position, TAG early position, specially on unopened pots and steal blinds throughout the tournament. Post flop, I don't recomend to c-bet every flop, since your opponents range on a tight field is stronger than yours.
The least thing you want to do against a tight field is to put dead money on the flop with people to act early.
If the field is very loose and passive, I would tighten up my range, but play ultra aggressive post flop, barreling for value.