The wagon and getting back on...

I need your help. I've unexpectedly fallen off the training wagon. Where just a few months ago, ticking off 40+ mile weeks was the norm, I now struggle to find the time (or motivation) to break 20. Excuses are mounting, alongside the zeroes in my training log. Victoria is fast approaching, and this is not the stuff of which PR's are made. How do you get yourself back on track when there seem to be so many reasons to not run?