A couple of years ago, a doctor brought the ~2300mg of sodium recommendation to my attention. While I had previously been considering foods based on calories, fat, etc., I had never even thought about the sodium level, nor how much I was getting or should be getting.
So I started paying attention. I was amazed at how easily you could fly way past 2300mg while still eating healthy otherwise. I began reducing my sodium intake on purpose, choosing low-salt or no-salt options when available, and cooking with less or no salt. (It's not always easy to find low-salt packaged foods! Some things I just stopped eating altogether, or eat very little of.)
It was initially an exercise in blandness, but now I'm quite used to the flavor, and am disgusted at the idea of eating as much salt as I did 2+ years ago.