Most people travel when they have to, for business or family reasons, or when they are taking scheduled vacation time for leisure.  But you should also pay attention to the affects of currency changes when you plan your travel, as such changes can have a dramatic impact on how much value you get for your money.  

Right now, the American dollar is strong, especially in places like Brazil, South Africa, and Columbia, making those countries relative bargains if you are a US traveler going abroad. On the other hand, the US is now very expensive for travelers from those countries.