i have lots of tips. i do facial to clients part time. from young to old.
1. the way u clean or wash or face. Maybe too rough and kinda pull down ur face skin.
2. Genetically. Well, cannot be avoided but have to depend on products.
3. Do u have sinus? It will always cause saggy face.
4. u can do botox..ehe..inject botox or collagen. it is very expensive and only stay for 3 months and then u need to maintain it. or else it maybe worse than before.just like anita sarawak.
5. Drink 'gamat' or sea cucumber. it's a high collagen supplement. i recommend my client to take ATM gamat. coz it is not smelly and very effective. it is also can be applied on the face. i use it for mask.
6. use guarana products...use on your face. tighten ur face.
7. lastly, oxygen mask or any oxygen products to renew your face cells.
8. Be happy always.

Hopefully all this will help.