I take as many classes as I can afford to and reasonably get to. Some by bigger names in the industry (Givens, Gabe White, Citizens Defense Research), and some by more local instructors who usually attend the same training with the "bigger names" with me. In the last few years, I've averaged 2 classes with the bigger names, and another 3-4 with the local trainers. Hoping to ramp up the part with the local trainers this year, as this area has a decent amount to offer.
I shoot a monthly match at my local outdoor gun club as much as I can. Sadly, things haven't lined up for me to make it to one yet this year.
I try to get to my local outdoor range for a couple hours of practice most weekends. Probably only missed this a few times this year, so far.
I think one can be safe and decently proficient with much less. I am personally to continue getting better at shooting and the "games" side of things (which I do with my carry gear).