As part of planning my next big bike tour-- 40 State Parks of Missouri that have campgrounds, 2000 miles, 45 days, in 2014-- I am already addressing the question of "What's next?" The reason I started thinking about it already is because every time I go through our route, I get a little sad when I look at the last day. I thought "I need something to plan to alleviate the sadness I'll feel when the tour is over!"
But I know from experience that when the tour is over there will be a period of time where I hardly touch the bike outside of daily commuting.
That is the problem with goals. When you've achieved them, they're done.
2009 Trek 7.2FX WSD, brooks Champion Flyer S, commuter bike