Cross-training or new and improved ways to kick your own butt

I'm sitting here with jello-y arms, smelling a familiar scent on my skin. No, it's not the scent of sweat, with which I have indeed become very intimate these past months, it's the scent of chlorine oozing from my pores. This is what I smelled like constantly through 15 years of competitive swimming. But I have treated pools and swimming as if they had some communicable disease for the past 15 years. Nice symmetry there, eh? 15 years of daily swimming and 15 years of avoidance (with only minor one day here or there lapses). Today, though, I made the commitment to getting back in the water. I not only need to give my decrepit joints a break, but I realized that my running felt significantly better when I was cross-training, as opposed to only running. So, in the spirit of overkill, I'm considering joining the Y's master's program (they only practice twice a week for an hour) to make sure I have directed practices. I'm looking to see which spinning class I can join since I thoroughly enjoyed that when I did it last year. And I've joined a new running group that meets twice a week to keep me in that as well since I think I mostly committed to a half marathon in a couple of months, suggested I'd run another full marathon next year sometime, and said I'd look into yet another half marathon next spring. Loads of running, master's swimming, and a spinning class. Anyone else smell a triathlon coming on? Honest to goodness, I should probably have my head examined, especially given how sluggish and sloppy I felt during today's 1100 yards. It should all keep me busy though and it's cheaper than happy pills, right?!