Motivation for working out again?

Since writing last about working out and the success I have enjoyed in the past year, I am struggling again with motivation which is my original topic and issue. I still feel as though I have a ways to go before I am in the shape I desire to be in.... but once that occurs...where do I go? I think it was considerably easier to get the motivation to get into shape or back into shape than it is to maintain that shape.

One of the things I have been realizing is that most of my life when getting in shape it was for a particular reason. The reality of my life and body style is that in order to stay in shape I will/would have to consistently exercise for the rest of my life. Do I like working out that much? No. So, how do you get the motivation or mentality that you can do this the rest of your life?

First, let's review my current motivation:
1) To be able to do active things with my family
2) Self-image, particularly how I view myself for my wife
3) Having that personal time every morning

#1 and #2 are not going to be as strong as I get in better shape. So, I have been working on a list of new things that could help motivate me that I can try to use:

1) A yearly athletic event or trip such as backpacking, triathlons, whatever
2) Regular sports that I would like to be competitive at

So, all I have been able to think of is that I need to have something I shoot for year to year. What else can I use otherwise? I am thinking I may have to find something to focus on year to year otherwise.