I ran the urbanathalon a couple of weeks ago which turned out to be the most amount of physical activity I have ever done at one period in time. A year or so ago I could never imagine myself running ten miles let alone ten miles plus obstacles. It was both challenging and rewarding and I would do it again in a heartbeat.
Buuuut...since then I have had absolutely no motivation to workout. This is changing tomorrow. I'm writing it down so it's set in stone. No excuses.