Adwords is really great, but you gotta spend an X amount of money to make it covert and find the right keywords. Here's my advise to you: monitor it daily and optimize keywords, bids. Also, be careful with advertising on content network, it can eat out your budget really quickly. And the most important - try not to use broad phrases like "milf porn" for example, target your keywords as much as possible and it will work for sure
