Here are a few ways to quicken your metabolism:
Exercise More: when your run, walk, of lift weights, you increase the energy required of your body, which raises your metabolism.
Work out with Weights: during weight training muscle tissue is stressed; afterward it's repaired-which raises metabolism. A woman who strength trains 3 times a week for six months can build enough muscle to burn 10-32 extra calories a day.
Practice Portion Control: Don't overload your body with a surplus of energy (food). Be specific with your portions and what your body actually needs.
Smaller Meals More Often: "grazing" is recommended by many experts, it helps normalize blood sugar levels and gives the body energy consistently throughout the day.
Laugh it Off: Laughing can help raise your metabolic rate by 10-40 calories, it's a small increase, but every bit helps.