Here are some tips that can help you tighten your skin:

1. Exercise: Building muscle mass through weight training exercises can help decrease the appearance of loose skin, especially if the loose skin is from weight loss.
2. Firming creams: While the effects of firming creams are often subtle, they may help improve the appearance of loose skin, particularly crepey skin in need of hydration.
3. Supplements: Collagen supplements may help improve skin elasticity and hydration.
4. Massage: Massaging your skin can help improve circulation and stimulate collagen production.
5. Laser resurfacing: Laser resurfacing can help tighten loose skin by stimulating collagen production.
6. Facial exercises: Various exercises to strengthen the facial muscles may help make the face look more sculpted. You can exercise the cheek muscles, muscles around the mouth and neck muscles to reduce the appearance of sagging.