Cross Training

I was curious what folks do for cross training. I'm dabbling here and there with Yoga, spin, lifting, and the biking or stationary bike. There are benefits of each but I'm finding it too easy to get carried away with the cross training, and not spending enough time running.  I'm trying to spin twice a week, do yoga once a week, and do weight lifting once a week while running four days a week.

Does anyone have ideas on how to balance this?

Training Ideas: General Strengthening

No, not this type of general.

It's no secret that runners aren't the greatest "athletes" in the world. Sure, our hearts could probably power nuclear submarines, but put us on a soccer field or a basketball court and the results won't be pretty.* Am I implying that runners need to have 40" vertical leaps, big biceps and finely tuned fast-twitch muscle fibers? Certainly not. However, runners do benefit from maintaining efficient form/technique, which requires a relatively balanced muscular profile, particularly in the core and hips. Unfortunately for we obsessive-compulsive runners, you don't build the necessary stabilizing muscles by simply running--you need some sort of supplementary training.

A friend of mine recently told me about Coach Jay Johnson, a coach and writer for Running Times who has a great website. After doing it for about two weeks, I've quickly become a fan of Jay's general strengthening routine. I'll leave the explanation to the linked website, but the routine focuses mainly on core strengthening and hip strengthening/mobility and only takes a few minutes. (I also found a handy, printable PDF diagram of the hip-blasting Myrtl routine that's a big part of this program.)

What do you do for strengthening? I'd love to hear your ideas and feedback, especially from the wily veterans out there.

*This certainly isn't true for all runners, but the point that I'm making is that runners typically have very developed "running muscles" and not much else.