Hey Lucky,
Investment professional here.
All the big investment and insurance firms are invested in shares, there is a very good reason for that. Take the US Large Cap stock market for instance: in average, over the very long term (200 years), it has made 6.5pct return over inflation. This is *average*. There are negative years, there are very good years, but all in all, for a well managed diversified portfolio of stocks, it is a very profitable investment.
The main reason why most people end up losing money in stocks is "market psychology" and herd behavior. It goes like this. When markets are growing, people are watching and waiting. When markets have been growing for a while now, that's when many people enter the market. But that's about when the market correct and starts going down. Then the "late entrants" are stuck, watching their positions losing money. They hope now that the market is going to bounce soon, and just hold on their loss. But when the losses accumulate, this is when they capitulate and decide to sell, crystallizing huge losses. But that's also about when the market eventually bounces back and starts growing again. Just google "market psychology" and look at the images, you'll see tons of graphs explaining this.
Professional investors manage their portfolio patiently across the waves, go through the market peaks and troughs with conceding to emotions and panic.
What you really need to do, however, is watch for the positions which are hit by really bad news. See Volkswagen for instance, recently hit by emissions scandals. These ones are the ones that will take a hit and stay low for a while (could be years, or could be never, until they recover). You need to take them out of your portfolio and reinvest the proceeds into "good stocks".
I agree with pks that stocks that are paying good yields consistently, and are buying back their own shares, tend to be from very conservatively managed companies, and tend to be better in the long run. I would also stay away from the most volatile stocks - these are for gambling only.
There was a post by Man-O recently, he identified some brokers that allow you to build portfolios with small amounts.
Cheers,
Seppuku