Congratulations on your first tri! I understand the feeling of utter sluggishness. I felt that way after the marathon last year. Tri Girl's advice is excellent--just get out there for 10 minutes. Keep a log of your workouts, and you'll see that you're getting back into it. I love the biking very much, so it's easy for me to ride to work, ride to errands, and ease back into longer rides that way. Also make sure you're nourishing yourself well, and not overdoing it on carbs. It can be hard to make that transition back to normal eating after intense training.

My feeling of excitement over a tri always has me sitting at the computer figuring out when I can do it again! This season I'm doing an Oly tri in August, a century ride in September, and a 1/2 marathon in October. Even so, I bet I'll be at least looking at other late season tris after the one in August. Doing a tri is hard and exhilerating. I always say that my favorite tri moments are (in this order):

1. the expo

2. the finish line

3. the start line

the stuff in between is HARD! Congrats again. L.