Lifehacker has a roundup of some great tools to help you acheive the goals you've set for yourself for 2008:
To reach the goals you've set out for yourself in '08, follow through each and every one of the next 365 days—several free tools can help you with just that. Track your progress and help motivate yourself to stick to your New Year's resolutions with our favorite goal tracking webapps and tools.
Don't Break the Chain (new habits, any kind of goal)
How does Jerry Seinfeld constantly pump out better and better jokes? His productivity secret is a simple calendar, where he X's off the days he writes, making a chain of X's over time. At webapp Don't Break the Chain, you can create your Seinfeldian chain to track your progress towards making new habits.
Follow the link for many more.