Easy
1. Appointed decent Federal judges. The single most implant and lasting thing a President can do.
2. Ended the dumbest war in American history. One down, one to go.
3. Passed a stimulus bill that, while too small, did avert a major depression.
4. Passed a flawed, but but still very important first ever health care bill that will approximate universal coverage.
5. While he foolishly bought into the idea of a "war on terror," at least he started fighting it like he wanted to win instead of just enriching the defense industry, expanding executive power, and cutting back on civil liberties.
6. Stopped enforcing some, but not enough, foolish immigration laws.
7. Repealed don't ask, don't tell. And just as importantly, the President finally stood up and said that the government shoud tell you who you can and can't marry.
8. Passed the Lilly Ledbetter Fair Pay Act.
9. Said torture is unacceptable no matter what the circumstances.
10. Restored out standing in the world. Now when you travel abroad, you don't have to be embarrassed about the President of the United States