One of the elements of the Getting Things Done productivity system is the "Waiting For" list. It's not complicated; it's simply a list of what you are waiting for from other people. The knowledge that you are waiting for someone else before a task can be completed can be vital; but if you forget about the task while you're waiting for a response, then you've dropped the ball.
The "Waiting For" list can also be a place for more exciting items, like packages of books (I speak hypothetically) or upcoming albums from one's favourite artists.
Anticipation is a lovely, elusive thing (I will avoid copying Emily Dickinson and will therefore not call it "a thing with feathers"). My parents' phrase was always "delayed gratification," which still holds much merit. Saving a new book for a trip, or having only one square of chocolate a day instead of an entire bar of Green & Black, or saving a special tea for an afternoon with a friend -- the enjoyment may not be immediate, but then one has a double-savouring of thinking about the event and then the event itself.
In less than two weeks, one of my major "Waiting For" items will come to pass. It's not written on any index cards; I don't need any memory aids for this one. There is not a chance that I could forget. It's been in the forefront of my mind since I arrived in France. And I cannot wait until January 17th.