IgorMord at SEOMoz gives following tips about managing PPC Compaigns:

1. Bidding Broad
2. Fighting for #1 Spot
3. Avoiding Geo-targeting
4. Losing Relevance on Landing Page
5. Getting Rid of Fraud Networks
6. Being Boring
7. Using Telephone Numbers
8. Not Bidding for Your Name
9. Lack of Affiliate Control
10. Not Separating Content Match from Search Results
11. Ignoring the Seasonal Copy
12. Lack of Exact Tracking
13. Paying for Negative Keywords
14. Mistaking CTR with conversion rate when testing ads
15. Not Using Keywords in Ad Copy
16. Not Calling Google
17. Avoiding Brand Name Keywords

Read the detailed post here.

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