I'm sure I'm at the low end of the "training" spectrum. 3 kids, ages 6 and under, so my time is limited. Every week is different for me, but here's what's typical. I aim for 5 workouts per week, and I don't follow a plan of any kind - it's basically what I feel like. Mostly I just workout to be fit, and occasionally I do an organized race of some sort (ocean swim, 5K or 10K, and recently, a Tri.)
Swim: 1x or 2x per week - one Masters workout, one on my own. Total: ~5000 yards
Run: 3x per week (outside or at the gym) with some interval work. Total: ~10-15 miles
Bike: 1x or 2x per week. Total: ~30-40 miles.
Other: spin class once or twice, plus other cardio equipment at the gym.
So, basically, I don't take it all very seriously... although I'm thinking of doing an Olympic distance Tri in October, so I'll probably have to step up my distances a bit...