Large companies will have more security in the stock market. If you want to make a safer investment, or if you are a beginner, definitely read up on some of the large companies that you can invest in. This is a great way to start and see your money grow slowly in the market. When considering a certain company, think about if you'd like to own the entire company. The businesses that have the best reputations and the most availability as far as purchasing their products or services are the most likely to do well in the stock market. Keep this in mind when selecting stocks.
Always keep in mind that money is a tool, not a goal. The money you earn, save and invest serves you towards a goal. The goal might be a boat, a home, or even retirement. You have a target number you are persuing because that target number means you can afford a lifestyle for you and your family that you do not currently have. If you want to leave your portfolio in the hands of a professional, use a full service brokerage firm. An agent there working with you will contact you with investment suggestions and provide research backing their advice. They also are going to monitor your portfolio for you and advise you when they think trades and changes should be made.