Stock Market Game

I plan on investing in some mayor companies since im not sure if whether small companioes are good or not. Some of the companies I have in mind are: UPS, AMT, SHA-WA, SNE and CSCO. Maybe ill consider joining a mutual fund but for now ill just be cosnervative and watch over my stocks to see how they go. If I see that one of my stocks go ratherly down than up i will sell it and buy a new one.