Long lasting cost effective solution that works.
Dont skip meals, eat healthy and eat enough not too much.
Transform your environment to support your weight loss, e.g get rid of junk food.
Instead of soda, drink water.
Instead of chocolate eat a fruit or a bowl of salad.
Walk, its free and very effective.
During dinner allow enough time after meals, dont just eat and go to sleep
Skipp a rope.
Walk up and down the staircase.
Join a outdoors fan club, a group that can encourage you to run for a cause, climb a range, plateau or mountain.
Find opportunities to travel out of the city where you can do some hiking or walking.