Managing your stakes or chips is very essential in poker. If you have a large stack, your opponents will instinctively take notice and will be reluctant to raise. On the other hand, if one of your opponents has comparatively large number of stakes, never get involved with him unless you have to. Also, when your turn comes early in a six or nine player table, you need a pretty good hand in order to raise even when you have a big stake at your disposal; because there is always a big risk of losing your chips to the people having lesser stake size. Even in late positions, it is not advisable to continually be calling for any hand. Remember, you need not be in all the existing pots.
One more important thing is to vary your play in poker. Having a huge stake doesn’t mean that you should keep on raising all the time. If you do so, even the weakest players will start playing back at you without hesitation.
Now, if you have a really small stack and therefore cannot survive more than one more round of blinds, then, when you get a pretty acceptable hand, you should go all in. After all, you will not have survived another round of blinds and even if you win & consequently double up, you will only be in the same position again, one round later.
Some players tend to hang in there even if they have far less stakes than their opponents. This is not advisable because being short stacked only makes you a target for other large stacked players. Therefore, it is better to get out of position in time than become a victim later.