My husband (also a triathlete) and I jointly decided that one of our 2008 goals was to work on getting more well-rounded in terms of life outside of work and triathlon. Aside from those two we love to do anything with our dogs such as hiking, ski-joring/cross country skiing, off-leash park, etc. We both love wine and good food so we eat out at good restaurants whenever possible, are working on our Washington wine collection, and are attending a charitable event that will have some washington vitners next Monday.
For us it's a matter of not letting triathlon run our lives as it has in the past. Perhaps we'll miss a run one night but we'll go to a silent auction for homeless pets instead. Or take a day trip to the mountains to go hiking. Or, my personal upcoming favorite, I happened to hear that a band we both like is coming to town and got us tickets. Even though neither of us are really "concert-going" type of people (at least since we graduated college mid-90's) we figured it would be fun and different from our normal routine. Yes, once again that means we'll be missing that evening's workout but I'm sure regardless of what happens it'll be a lot of fun. Or we go to the aquariam or the zoo. Totally dorky but we love it (and neither are too expensive).
Oh - and "date night" is my favorite thing in the world. As a true triathlon dork our date night is a ride together but it's not a training ride so much as get on the bike for 90+min and bike to my absolute favorite place where we live. It's a great bike ride and something we try to do on a weekly basis once the weather warms up and it gets light enough at night. I can't wait for that to start up again.