Perhaps the most important principle of making money, is not loosing it. Money Management is the practice of trading wisely with regards to size of your trades, among other things.
Trade in Tiers:
If you start with $1000 - then trade only $50,000 until you can afford $100,000. Then only trade that until you can afford $200,000, then only trade that until you can afford $500,000, etc.
This allows any losses in between the tiers to equal PIP for PIP your gains. If you trade all your profits from the last trade with the last trade amount - should you lose the exact same amount of PIPs as you just won in the previous trade...your account will be worth less after both trades - INSTEAD of being even.
