What's he done? There are lots of lists about major legislation and so forth - those are easy to find - e.g. http://www.huffingto...-10_n_192603.html and http://www.whitehous...igned-legislation . A few others I like are:
1) Rationalized rules on classified information: http://www.whitehous...urity-information
2) New rules on improper payments due mistakes, waste, fraud, abuse: http://www.whitehous...improper-payments
3) Chesapeake Bay Protection and Restoration to be overseen by EPA: http://www.whitehous...n-and-Restoration
4) Removing barriers to Federal funding of stem-cell research: http://www.whitehous...-Human-Stem-Cells
5) Closure of the Guantanamo detention facility (yes, I know it's been pushed back, but it will be closed): http://www.whitehous...ention_Facilities
Nate had a good post on the subject today, too: http://www.fivethirt...ip-epic-fail.html
Is he perfect, of course not. He's got at least 3 years to get better. ;-)
HTH.
Cheers,
Scott.