Poker Calculators and Do You Suffer From the Top Pair Syndrome? by Marty Smith
... We are all susceptible to impatience; it is an inner enemy when playing poker. But I have seen thousands of times when in the first couple of hands, players have their whole stack on the line with AJ suited after the flops comes Jack high. Yes, they do win often, but lose just as much to someone on a silly draw, or a made set. It goes along with the philosophy of needing to double up early, or just not play the tournament. This is simply foolish.

Texas Holdem Tournament Strategy - Poker Tournament Betting Basics by Rick Braddy
... Unlike playing online, where the total size of the pot is easy to determine (the online Texas Holdem poker program typically displays the pot amount right there on the screen for you), when you play in traditional offline poker tournaments, you must keep track of the pot size and chip count yourself, so you can estimate the pot odds and your best betting options. Pot odds become especially interesting as the blinds and antes increase as the tournament progresses.