I've posted this over on the sport and exercise topic but thought I'd drop it here too.
I recently bought a fit bit step tracker and am using it to up my activity levels by aiming for 10,000 steps a day.
there is currently a groupon deal with 20% off here
www.groupon.co.uk/deals/national-deal/Chemist-4-U/15989907.
I also found a walking challenge for 1 mile a day for 365 days - it's basically a 15 min exercise video that is just walking steps to cover approx 1 mile, so a very easy way to get more steps in and start a gentle exercise program.
www.walkathome.com/1-mile-walk-challenge/