Research the way the stock market works and familiarize yourself with its nuances and general ideas. Understand that purchasing a stock is actually buying a small (but very real) piece of a larger corporation, and learn about the rights that ownership entitles you to.
Find a broker that will serve as your liaison between you and the companies you will be buying stocks from. Speak with a few different financial advisers and brokers about your current financial situation and future goals, and select one that you feel will be able to best represent your goals. Finding a broker that is familiar with the electronic sector will also provide you with the expertise needed to choose the best Bluetooth stocks.
Diversify your portfolio by purchasing stocks from different Bluetooth companies. Diversifying your portfolio allows you to dampen the effects of a drop in one of your stocks, as you will not have to rely on that one stock for all of your dividends.
Research different Bluetooth companies by looking at their earning history, projected earnings in the future, and the current price and recent pattern of stock value. Arming yourself with information about a company will not necessarily translate into huge profits, but it will let you make a more informed decision, and allow you to avoid a company that may be on the brink of hard times financially.