I’ve recently discovered Ari Meisel a self-described “Achievement Architect”. His website and podcast called ‘less doing’, have a following of people that just want to do everything efficiently and optimally.
Here are a few posts about finding time to get chores and cooking done: http://www.lessdoing.com/2010/ 10/28/fundamentals-of-less- doing-batching/
Which will in turn get you to the gym.