Although it might seem that Google Adwords is an affordable medium, you can quickly amass thousands of dollars in credit card bills if you commit mistakes out of ignorance. You can always delay putting up your Adwords campaign but the insights and rewards will come only after you start your campaign and continually find ways to improve it.

Fortunately, there are lots of information about Google Adwords in the internet. Unfortunately, you have to spend a lot of effort and time with sorting out good advice from bad ones. Your best bet is to get your advice from someone who has done what you want to do. Perry Marshall has been teaching about Google advertising through his book "The Definitive Guide to Google Ad words" not long after Adwords had been established. In the book, Perry tells all his secrets in creating effective campaigns.

When you want to create a profitable Google Adwords campaign - a campaign that gives you laser-targeted traffic that generates sales - make sure you're not making any of these five common mistakes:

1. Not writing keywords in your ad's body. Beginners often make the mistake of not including the keywords in an ad's copy. Include at least 1 or 2 keywords in your ad copy for a more compelling ad.

2. Directing your ads' traffic to your homepage. The primary purpose of a homepage is to provide broad information about the contents of a website. It's very likely that those who clicked on your ad will leave your site if you direct them to your homepage and not provide clear instructions on how to get the information they want. Your ads could be the best ads in your market but you won't make a sale if all your visitors leave after a second. Make it easy for your visitors by stating your offer upfront on a landing page.

3. Using only broad match keywords in Google Adwords Keyword Tool. New users only use the 'broad match' function in coming up with keywords in Adwords Keyword Selection tool. This function is only useful for you to gain a feel of your niche or market. Keywords produced from phrase matches and exact matches will yield keywords that are more apt and targeted to your market.

4. Having poor-performing keywords. The terms you use to describe your product or service aren't always the same terms that the market use online.  You will need to generate a list of relevant and similar keywords using the 'synonyms' feature on the Google Ad Words Keyword Selector Tool to drill down on search results and optimize your campaign.

5. An uninteresting headline. State your USP in the headline. Headlines are important because they catch the attention of your reader and compel them to read the remainder of the copy.