If you want to learn the ropes of AdWords, I would suggest an affiliate program with a maximum of 3 to 5 competitors. This will allow you to experiment a lot.
Anyway, the best way to get clicks is to put your keyword in the title and body of the advertisement. If you have some dough to splurge, bid high so that you can get into the top 3 position. Now keep changing the ad copies till you get one with the maximum CTR. Within a couple of days, you will see that your CTR will shoot up. Once that happens, reduce the maximum CPC.
You can also try bidding for not-so-popular keywords and get some inexpensive clicks.