One of the biggest banes of travelling for business is that your shirts end up looking like they've been through the proverbial hedge backwards. Two handy tips to solve this problem are:
a) Try and roll up your shirt when packing. This removes the number of folds that can create creases
b) Hang up your shirt in the bathroom whilst you have a shower. The steam should help reduce any small creases (depending on how steamy you get the room!)
In your hotel room