Clinton succeeded in getting Obama to send an additional 20,000 troops to Afghanistan in 2009, over the objections of Joe Biden.
She negotiated the
historic Turkish-Armenian accord which opened the borders between the two countries.
She visited Pakistan and strengthened our diplomatic ties with them.
Some more stuff:
Revived Middle East peace talks:
http://www.nytimes.com/2010/09/05/world/middleeast/05clinton.html
Restablished relations with ANZUS which had broken down 25 years ago:
Clinton crushes 25 years of ice Stuff.co.nz
She has a long track record of fighting for women's rights around the world:
http://www.newsweek.com/hillary-doctrine-66105
Coordinated tsunami relief for Japan:
U.S. Officials Pledge to Help Quake Tsunami Victims
There's more if...you know...you LOOK.