No tricks really, just some tips that you can find in some petpages (check neoboards). Some months ago, it was a good tactic buying LUPE at 80-100 and selling at 140-160, but it went down and I lost almost a million.
I always buy stocks at 15-16. It is good to buy ones that have just gone down (they have a red negative percentage), because that means they are likely to go up again sooner. Then you can sell them- not below 30, because otherwise the profit is negligible. However, if you are trying to get it up to 100, be wary: it can shoot down suddenly, so sell when it's safe.