2013 nearing 300 000 km. What upkeep / preventative repairs should I do?

Besides routine oil change, brakes, spark plugs. I always do those consistently. I have also recently replaced both wheel bearings due to failure.

Long story short I need this car to last as long as physically possible, I will be driving it into the ground and I’m hoping to make it to at least 400k if possible. I have a week off work coming up soon and I plan on doing a lot of work on this thing including bondo and wrapping the entire body and replacing a bunch of missing and broken shields/parts. More importantly than that I’m wondering if there’s anything I should do that you guys recommend from experience would be good to do. I know how to work on cars but I don’t really know shit about them.