The first thing you should do before starting your Adwords campaign is to read the Google Adwords Help section. There are a number of concepts that it’s good to understand before throwing money at Google. This can shorten a potentially expensive learning curve.
Having said that, here are some quick tips to get you started:
1. Set up a campaign. If you’re just starting out, promoting to the content network will be over your head, so don’t include that in your campaign.
2. Set up an ad group targeted to the content of one page on your website. That page should obviously be optimized for a set of keywords. Use those keywords in the adgroup, as well as in the wording of your ad. Link the ad to that page. Don’t link to your hompage.
3. Set up ad groups within the campaign for each page you want to point traffic to. I’d recommend starting off with phrase match keywords, which is your keyword or phrase enclosed in quotes. If you use broad match (no quotes), your ad could show up in non-relevent SERPS because one word of the phrase could take it out of context.
UPDATE: 3/14/14
Here are some related articles with more information on Google Adwords
Pay Per Click (PPC) Adwords Campaign Management
Adwords Conversion for Dummies