1. Use corset. It is not a cheap way, but if you have one, it will be very effective. To wear a corset helps to create a waist line and maintain good posture. If you wear a corset for the month you can reduce the waist by 10 cm!
2. Use hoola hoop. But it can make dark spot there.
3. Do some seat up to make your belly muscle strong. It will make effect on your waistline.
4 Do massage
5. Make habit to retract belly like you are doing swimsuit photography. It will help you to tighten tummy.
Following these tips you will make your waistline ideal easily without spending money for this summer. And to look breath taking.