I ride my stationary bike everyday for 30 minutes and I walk an hour about 3 times a weeks doing errand around the city. I can't afford a gym membership right now but I am looking to become fitter and build over all strength. I don't consider myself super fit but I do do some form of exercise everyday. Can anyone give me some suggestions of things (exercises) I can do, please remember I am on a tight budget. I eat a very healthy and all organic.