How do people get 1-3 cent clicks???

No matter what my search terms are, I always have to pay at least 10 cents it seems… but on my adsense account I routinely get 1 cent clicks.
I know that google takes about half of the money, but how do people get these very low cost clicks?
Also, what is the best PPC company to go with to get inexpensive clicks?

Original post by Waffleguy