[Yerma]

Preflop:

ATo sucks unless you can attack the blinds with it. Just fold.

Flop:

You have no implied odds if you're calling a bet with players still to act behind. Don't call so slim when someone might raise or is likely to raise behind you.

Turn:

Vaguely ok if you're just calling for the right reasons. If you're not sure whether you're ahead or behind, there's nothing wrong with calling and keeping in the overcards/underpair from the preflop raiser. If he has AK, you're in trouble either way. If the bettor has you beat you're in trouble either way. But if you have them beat then you should raise for value instead. Considering the flop action, I'd guess you're ahead when the Ace falls, so I would usually raise here.

River:

Awful.