Walking: The easiest exercise to do. Easy to sustain and can burn loads of calories depending on terrain. Also recommended by Dr MM. My tip is to map out circular routes with one of the many cycling/running/walking websites. You can enter your weight and other details and it will tell you how many calories you've burnt.
This one works for me: http://gb.mapometer.com/, I've got a few that I've worked out for lunchtime strolls at work and longer ones from home.
This one works for me: http://gb.mapometer.com/, I've got a few that I've worked out for lunchtime strolls at work and longer ones from home.