When is the best time to get a lifting procedure?

Does the effectiveness of lifting procedures vary significantly depending on age? I am curious if there are cases where people receive the procedure in advance even if their skin sagging is not severe.
I would also like to know how often it is generally recommended to receive lifting procedures like Ulthera or Thermage. What is the appropriate interval to maintain a natural look?
I am also curious whether the effects of thread lifting completely disappear over time or if some remain.

I am wondering if there is a specific age limit for Botox. Is there a standard stating that getting it at too young an age could look unnatural?
Also, there is talk that resistance can develop if you get Botox repeatedly, and I would like to know if that is actually the case.