The most important thing is the effective stack, and if you lost some pots early on, that will usually be your own. When the effective stack get down to around 30-40BB things like setmining become less profitable, and you need to tighten up a bit. When it get down to around 20-25BB you can start to rejam over a normal open raise, and when it get down to 12-15BB you can start to open jam. The exact numbers are up for debate, but just to give an idea.
Also if you are the effective stack, you will have less fold
equity, when you jam, because you do not threaten the other players tournament life. So you should probably reduce
bluffing a bit, since you are more likely to get called. This is especially the case in bounty tournaments, where you will lock really delicious to other players, if your stack get short compared to your bounty.
With all that being said losing part of your stack early on will happen from time to time, and it is important to not give up and start making silly moves, because a comeback is always possible. However if you find yourself in this situation time and time again, then there is probably some leaks in your deep stacked game, which you need to find and patch.