what strategy do you use to not break the bankroll, value games for those who have 100 dollars
my strategy would be to play low buy tournaments from 0.1 to 1.50 at most and try at most to leave with a guaranteed position and first of all run away from cash game at table and snip and go these break you easy better just go in tournaments
I would use the 100 to150 buy in rule. If you use this you will most likely never go broke but do remember that does mean moving down if needed. So with a $100. you can start with $1.00 games. Once you are down to say $75 you will need to move down stakes until you get your roll back to $100.00. I would also stay on smaller games. There is nothing like winning or finishing in the top 3 when against 3000 players, but the large the games the larger the variance will become.
With $100.00 I would be OK playing $1.00 games to start if the games you play are 150 players or less. If not You may want to play games at $0.55 to $0.75 ish or so.
With 100$ you can take some shots at 5NL, if you play cash games, but you need to be ready to drop back down to 2NL, if it drops to 60-80$. If the poker site has 4NL as the lowest limit, then 100$ will be a reasonable starting bankroll for that as well.
If you play tournaments, then several have already mentioned the 1% rule of thump, which is really easy to remember. With 100$ that basically mean 1$ tournaments or below. Maybe you can bend it slightly and play 1,1$ tournaments, if you also mix in some lower buyins.
It does depend on field size though, and if you play 6-9 man SnGs, then 100$ is a fine bankroll for the 1,5$ variety of these, which many poker sites has. On PokerStars specifically you could play a mix of mainly the 1$ 45 man and then some 1,5$ 90 man bounty for the sake of variation.
I recommend Googling Jonathan Little' Bankroll Bible. This is a detailed guide that can help one understand the importance of bankroll management and exactly the math that needs to be applied to the bankroll.
Absolute discipline in bankroll management. You should first decide whether to play cash game or tournament poker. I am not a cash game player, but a possible strategy could be to risk a maximum of 1% of the total bankroll on the day. If you are 3% in profit you should leave the table. In tournament poker, you could risk a maximum of 1 - 0.1% of your bankroll per tournament.