Annalise
The first thing to do is determine how much risk you are willing to take. The Motley Fool has some tools to help you determine this. I think it's
http://www.motleyfool.com or do a Google search for the URL.
I subscripe to the view that the money that you invest should always be money that you can afford to lose. Never borrow to "leaverage" an investment that is hyped to you. Stocks that are being hyped are always very close to their last stop. Example BreX, Nortel, Enron, I could go on and on.
I'm quite conservative, so I always tell people that their first investment is in themself. If you don't have an education, invest in one. The next investment is in their financial security. Own your home, fully invest your RRSP, put money that you would die if you lost in the very safe Widows and Orphans stocks (It's not a W&D if it doesn't pay dividends) Government Bonds, GICs, etc.
Once you are in the position that you have a sum that you won't die if you lose it, research companies that you like. Do you buy their product? Do you think others will? Does what the company is doing excite you? I don't mean the person that is paid to hype the stock, I mean what the company is actually doing. Go to the library and get their financial reports. Do the numbers add up? Are they actually selling a product? There is a horror story in BC of reasonably smart people that got caught by the hype and invested in a company that was only selling a dream. (mostly of the insider getting rich and moving to an offshore haven)
Watch the company for at least 6 months. If it is real, it'll still be around. If it's moose pasture, Murray and buds will have already cashed out. It's a good idea to develope a list of people who, if they are associated with a company, you will not invest. I managed to avoid 360 Networks that way and unfortunatly that can work against you, because I stayed away from PCS which was real but had people on my list promoting it.
Visit the company. I can't stress how important this is. You deal with many people. Ever wanted to run away screaming when you met someone? If the building doesn't match the picture on the pamphlet, it looks like a phone room, the building is a post office box, don't invest.
Nobody can intelligently invest in more than 5 companies at a time. That's with full research. Mutual funds invest in more because the law requires them to do it and they have staff. Mutual and Pension funds got badly hurt in 2000 because even they couldn't actually research their investments properly with too many.
Subscribe to industy journals in the business that you are researching. Most are free and the amount of information that you can get is incredible. You may find that the company that you are interested in isn't the most exciting play in that industry.