I changed jobs twice, once required longer hours and more travel. I could have still rode to work, but I was leaving the office at 6 am and getting home at 7 pm, so the thought of getting up at 4 am to ride in and getting home at 8:30 or so.. not really where I wanted to be. Then my office moved, and I lost the shower. I'm far too sweaty to ride in and not shower, so there went that.
Then I got a new job and moved from Tampa to NC. The weather is much better, but the first winter has been rough for my mileage. I only had a few fall days to get some riding in.
My 2000 mile goal is stuck at 1200. I leave for christmas on Thursday and probably won't ride till I get back on Tuesday.