I'm definitely a better fisherman than I used to be. No one thing accounts for that, more likely it is several things
First - getting a bigger boat that allowed my to spend more time on the water. The bigger boat gets me from here to there quicker than my last boat and I spend more time fishing and less time moving from here to there. Secondly - hanging out with a better class of fishermen, fishing BFL tournaments, drawing pro & semi pro boaters, different folks on this site, etc, you just learn more when you hang out with folks who know more. Hanging out with the local club, back in the early 90's, all anyone in that club did was ride around and throw spinnerbaits at the bank. Third - just like your shop teacher told you back in high school, "Use the right tool for the job." I think decent gear makes a difference. As my employment life got a little more settled, I got to where I could afford to get better gear.
One time I drew a pro at a BFL event and he took one look at my gear and told me to get my gear to match. At the time, getting all my bait casting reels to match made a huge difference, I could lay down my worm rig, pick up the spinner bait rig, and the reels worked the same. Before, the slight differences in weight & balances made my first few casts inaccurate when I switched rigs. There are lots of other examples of the principle of using the right tool for the job. There is always a catch, and as far as fishing gear goes, the catch is, "Use the right tool for the job - FOR YOU."
For another example, my idea of what is and what ain't a perfect worm rod isn't exactly the same as what several of my buds think a great worm rod is. So I don't fish as well when I try to use their gear and visa versa. That is part of the charm of fishing that you get to decide what is best for you. A sad but true fact is that your wallet also has a say in that decision.
Edit - I frequently do band wagon thing and try a new technique soon after I hear about them. A couple of reasons - 1 - if there is a chance a new method of fishing will catch me more fish, I want to find out about it and -2 - I'm pretty set in my regular fishing gear so new techniques = chance to acquire more gear.
For instance, I can recall when nearly everyone I knew and many national publications said that the senko would probably be a fad, and run its course, just like the sluggo previously did.
I got on the A-rig band wagon and while it doesn't work all the time, those times when the a-rig is working, if you ain't throwing the a-rig you're fishing for 10th or 12th place. Chatter baits were supposed to be a fad, according to many local fishermen I knew, and it turned out that wasn't the case. Same deal with the Ned rig (Although I find it humorous that the basic principles of Ned Rig
fishing are VERY similar to Slider fishing popularized by Charlie Brewer in the 70's). And so it goes . .