As I have grown older, I have learned to understand some of the quirks in my personality, and adjust my expectations accordingly.
For example, my whole life I have always had periods of intense interest in some subject only to lose interested after a couple months. Various video games, RC Car building and racing, drawing, electric guitar, etc.
So now when I get older and I get ultra interested in some new subject, in the back of my mind I say “Ok, I know this seems like the most important thing right now, but in 6 months you will proably not be THAT interested anymore.”
I would have bet you money that would have been the case with my most recent endevor, trying to learn spanish. But here I am, listening (even paying for) podcasts, buying iPhone translation software (this software is really great), taking Spanish lessons twice a week with an instructor from Peru, and even booking a vacation to mexico to get 6 hrs of Spanish instruction a day.
I guess in my old age I am growing my attention span :).