If you're playing Zoom (or Rush on Full Tilt), or full ring, it really depends on multiple factors that earlier responses have gone into in great detail, so I won't regurgitate what they said. However, let me provide you with an example.
I'm in one of the blinds, and there's a raise to me by a late position player (pretty standard play). If your stack is deep enough (50+ bb's), shoving is not really something that should be entering your mind at this point. You can do one of the following.
Fold (I'm probably doing this most likely in situations where there's been a raise and a 3 bet behind me, whether it's 6-handed or full ring).
(a) You're out of position with a drawing hand and you could be up against a pocket pair that has you looking for outs which may/may not necessarily help you.
(b) Not often, but something to consider - because action won't close with a call or a 4 bet, you're putting yourself into a position where you could very well be playing for your stack, and with multiple players in the hand pre-flop, it's something you have to determine if you want to gamble.
Call - Under-repping your hand here. If you feel that you can outplay your opponent when the flop hits, you can try doing this. Many times I have taken the hand down post-flop even missing the flop. Sometimes you may have to double/triple barrel on the board and if your opponent is a pretty sticky, it may not work (hence the importance of taking notes).
Many times you can get a player to fold a pocket pair on a board with 1-2 overcards (ie: opponent has 88 on a 6QT board). It's about applying pressure at the right time to the right opponent and it works a fair amount of the time.
The best thing to do is watch players play online on Twitch. If you're playing MTT's, then watch guys like Jaime Staples, Jason Somerville (for example). If you like watching cash games, Doug Polk (WCG|Rider) and Adrian Fenix are a couple of good examples. There's many more out there, but these come to mind. There's so much free content out there for you to watch and absorb. I know it's helped my game, though I still have my own leaks I'm trying to address.
Raise - An obvious option here, as it puts immediate pressure on your opponent by putting more money/chips into the pot earlier in the hand. For example, you have a hand like AK, and the board comes out Kxx. Some part of the time your opponent may have a hand like KQ that they think is good here and may pay you off pretty nicely.
It's all about putting your opponent into tough spots where the potential for making mistakes increases.
Mostly though, it comes down to what you are most comfortable with doing. Keep in mind that mixing up your game is good because what you do want to avoid doing is becoming predictable, so balancing your calling/raising frequencies here is good (and on the rare instance, folding).
Good luck at the tables.
as a lot of players told you already AK is profitable to call all in of these guys who have shortest stack than you.
