Seeing the present value of our magic beans has probably never been easier than with my xe.com app. On a day-to-day basis, I find it a very frequently-used tool.
We often need to compare the Canuk and Yankee bucks. Also, there are some base currencies which we constantly compare against. More interestingly, I set up upcoming destinations well in advance to get used to the spending power in the local currency. For example, I am now comparing our present expenses to those of where we'll be spending next winter.