Have you seen this concept that is being pushed by a chap called Al Humphries? I have done a search and can't see it in any results. He is encouraging people to just get out and about and do stuff they wouldn't normally do. I have been following his blog for a while now.
The beauty of what he does is that he makes adventure accessible and is reassuring that the adventure does not have to be BIG to be an adventure, so walking home from work, or using a different route are in there. He is trying to get someone from every county to sleep out just once on a hill this month. Last year my son and me slept out somewhere different each month. We also slept on the lowest point of OS Explorer 141, then walked to the highest point and slept there the next night! He is all about safety too, and is trying to point out that it doesn't have to be Snowdon, Ben Nevis or Everest, just the hill you see from your lounge window!
More here >>>>>>
http://www.alastairhumphreys.com/plan-microadventure/
A great idea, and a really easy way into a bit of fresh air!