According to Dan Harrington, what you need to do in order to assess your position in the tournament is to divide your stack by the size of the blinds. In that way you get the number of the rounds you can play without putting in a bet or a raise (M). That information can be used compared to other opponents’ M and especially if you are near the bubble or the final table. If your M is greater than 20 you should try to steal blinds and bluff, if it is one or less just go all in when you see the opportunity. In other cases, you do something in between those two extremes, depending on your M’s size.