Preparing for the GMAT
Part 1: Internet Research
If you enjoy internet research and love to learn, then self-studying for the GMAT is a thing you could do. You're cautioned that it may take more time than you presently have to give... but ceteris paribus, if you're an autodidact, then you should go for it.
Internet researching the GMAT is critical to getting this done in months, as opposed to years. If you are the sort of person who might join the Autodidact Olympics, then go ahead and don't use the internet resources. But you get points for avoiding gmatclub and doing the hard work in wikipedia. Either way, there's only one word of caution more that I have to give: