What heightens your metabolism?

i am just guessing here, but i don't think you can make your metabolism higher. i am pretty sure that is genetic and that you are born with a high or low metabolism. if you want to loose weight just replace unhealthy snacks with healthy ones, and remember not to starve yourself. instead of having a usual bowl of ice cream have a yogurt or apple instead. What i do to keep in shape are sit-ups, bicycles, and crunches. i try to do 100 of each a night, but you can start smaller like a few sets of 10 for each.