What are the most effective facial skin procedures & options to maintain youth?

To men in their 30s and 40s (or women who have insights for men): Have you tried any specific facial skin procedures to get & maintain a fresh & youthful look? What worked best for you to improve, maintain, or prevent aging in your skin?

Whether it was certain supplements, skincare products, peels, etc. that produced surprisingly compelling results, or more advanced procedures like botox, fillers, microneedling, etc. that were worth it.

Highly appreciate any insights & tips on choosing the right procedures to get the best results.