A former colleague asked me to look at his website a few weeks ago and I gave him a few suggestions for improvement. We then went through his ad budget and I recommended a small pay-per-click campaign. He was concerned that it would be expensive, but I showed him how can you start small and manage a budget on Google's Ad Words tool.
After some tweaking to his Google campaign, his website traffic doubled in two weeks and his business improved. We can never be sure it was entirely the changes, as the market has been getting better, but it had to help.
What's really exciting is he asked me to check the campaigns to see if they needed adjusting and told me he created his own campaign for a different product. The campaign has already paid for itself in specific results.
It goes back conventional wisdom - you can give someone fish or teach him how to fish. He now has ownership and can generate traffic/revenue as opportunities arise.