Guys, we're talking to (probably) a total newb here.
nizoral = Nizoral, which is a shampoo that is recommended to be used 3 times per week. It helps stop DHT, which is a key element to hair loss. There's 1% and 2% strength available, which can be found in your local drug store / WalMart. 2% is known to be most effective.
Minoxidil aka Rogaine is offered in many percentages and varieties, such as liquid minoxidil and foam minoxidil. Most commonly distributed in 2% and 5%, and comes as high as 15%. Rogaine is most effective in men (in studies) at 5%. It's applied twice daily to your scalp (morning + night).
Finasteride, which is better known as Propecia is an oral pill that is taken once daily and blocks a type of DHT. Lots of people have success with this. Depending on your prescription, it can be costly, however, some people split their pills for a lower dosage and save money while getting nearly the same efficiency.
All 3 of these solutions have potential side effects, but in the vast majority of the population, it's pretty minimal.
Feel free to browse the boards and find more about these things, as we call them the "BIG 3".
I do Scalp Exercises on a daily basis, and some users, such as SE-Freak has had wonderful success.
Hope you find your way!