Friend, control and bankroll is one of the hardest things to have when you are a beginner.
The best thing to do, put on paper or spreadsheets game goals, Example: I will play 50 tournaments for $ 0.10, being 3 per day!
so I followed the plan.
Create a plan that is a bit beyond what you believe you can get, so you get past your goal.
Many books tell you to play an X tournament, you need to have 100X buy-in from this tournament to be comfortable ..
The fact is that I question this, because of where they take this parameter? based on what?
A clear example is that this does not work, if you filter out Pokerstars' 10 player (the most profitable), and analyze what they have played in 4 years, you will see that it has a 300 buy-in loss in some periods. The joãoimão even arrives to have more than 30 thousand dollars of prejudice something to analyze your graph in a whole ...
To finish, 100 buy-in, 200buy-in matters little, the important thing is that you feel comfortable with your bankroll and have the discipline to follow your plan ...
You must understand that playing poker to be profitable, and as an investment, one hour you hit a big tournament that makes you have 100% profit of everything you invested ..
I hope I have helped.