any helpful tips for intermediate cyclists? 🙏

first post here, I’ve seen a lot of great stuff on here already but I’d like to know if anyone could drop some tips that have helped them with paved road/sidewalk cycling? really anything in general that would be helpful to know!
personally I have learned that saddle angle is super important, I used the wrong saddle type for two years and messed up my back pretty badly without knowing it. thank you!