To learn more about what you can do with testosterone, see How to Get More Testosterone.
My favorite testosterone supplements are testosterone cypionate and testosterone ethyl ester. I recommend testosterone cypionate in the first month because it is a natural and inexpensive supplement that I personally enjoy. I also use testosterone ester for a month to see if the dosage is enough for a serious and consistent level of testosterone production. I also get a supplement of testosterone ethyl ester in the last month for a long term testosterone supplement and for a man who feels he is getting too little testosterone. For more info, see my blog.
I don't recommend these products because they contain testosterone ester, which contains ethyl estradiol. You have to take testosterone cypionate and/or testosterone ethyl ester daily, as these supplements can be very harmful to the body. There are other natural testosterone supplements I recommend, such as T and D T/D, Testone-A, Testosterone-E, and DHT. And for your reference, here's a chart of the dosages for these natural supplements. This is an excellent article, and I hope I will get a chance to read some more of it! I have an awesome product line, called The Way Forward, with many natural and herbal testosterone boosters.