To "stack off" is essentially to commit your entire stack to a hand. It's generally used negatively (i.e. "you had to stack off with bottom set there, it's just unlucky he had top set), but I guess it can be used 'positively' too.
You will have a job finding an article on how to play TPTK or suchlike on all streets simply because there are so many variables at hand it would be impossible to write an article on it without it becoming more like a book. Poker is not a 'solvable' game - nobody can say to you "When you flop TPTK always bet but always fold if you get raised" because it simply isn't good advice. The texture of the flop, the other players in the hand, your table image and a hundred and one other things of varying importance will (or 'should') all impact your decision-making process.
Best advice I can give is to post some hand histories of flop/turn/river decisions you weren't sure of. That way, not only will you hopefully learn what the right move in a specific situation is, but you can also use your knowledge to apply what you've learned to similar situations too.
That and get hold of some literature, too.