If I had to do it all over again, I would check my ego. I picked up clubs and headed right for the tees with everyone else. I spent so many years slicing off the tee that I started fearing playing golf altogether. Took a long time to get over that.
When I moved to Iowa for my first NWS job (2008) I dedicated myself to trying to improve. Bought my first real set of clubs, started watching the Golf Channel self-help shows, hit the range a couple times a week. I broke 50 for the first time in 2010 (shot a 46) on the little 9 hole course just north of the office, Rustic Ridge. 7 years later I got my handicap index down to 9.7.
Someday I'll tell my son how he blew that up.