"The more-expensive investor newsletters and computer services only make sense for investors with lots of money — if then," Tobias says. "Besides their cost, there is the problem that they are liable to tempt you into buying, and scare you into selling, much too often."
Plus, "Half the experts, at any given time, are likely to be wrong," he says.
There are plenty of free, online resources that you're better off tapping into. Tobias recommends Yahoo Finance to learn more about publicly traded companies (you can look at annual reports, charts of performance, and earnings estimates) and Morningstar to learn about mutual funds and investing in general.