What urges you to wake up every day and get out there in the world (besides your alarm clock)? Do you have a particular goal you're working towards? What makes you happy in your life -- are you getting to do that enough, or is too much of your time being taken up by other, less-satisfying things?
At my age, people are often caregivers or the recipients of caregiving. I happen to be in the former category, so my major motivation is to try to ensure that the person i care for will continue to prefer being alive to being dead. But if i did not have this purpose, i'm pretty certain that i would find some other "outer purpose" I am learning that my inner purpose is simply to be present and aware. (I just noticed that the word "AWarE" contains the word "awe.")