Business Insider has compiled a list of the 10 best free iPhone apps for business and the 20 best iPad apps for business travelers. The lists are pretty comprehensive, and just because you don't fly around from one meeting to the next doesn't mean you need not check them out.
From Todo and Evernote for the iPad (which has been extensively covered here on TUAW) to Yelp and Bump for the iPhone, there are some real gems to help you stay ahead of the game.
If you've got a shiny new iPad or iPhone, but you're struggling to sift the good from the bad on the App Store, this is a great place to start.
Business Insider even points out that, if you put the apps to good use, maybe you can claim the paid ones back on expenses. That's good thinking!