Well, it all depends, which stock market?
There are heaps of books about the stock market, especially from Jim Cramer (and sometimes Ben Stein).
It is not too complicated if you are good with math, patterns, and up to date on current events (economic and political).
The main trick is buy low, sell high, obviously. Many companies have easy tell patterns as to when they are about to jump. A lot of nubs will do the cheap, "penny-stock" the decrease loss, but if it is a sure thing, go for it. Logic beat instinct in stocks... just like casino gambling, you have better odds counting cards (logic) than just luck (instinct), the only difference is, counting cards is not illegal in stocks, you can do your math.
My best idea for practice, is to keep track of the stock on paper or a virtual stock market and pretend you are trading. In other words, do a little research on some stock, pick one and an amount you would invest in it, chart its growth or losses, and decide when to sell, then further monitor that stock; and then you know how well you can read the market.