One of my main solutions that let me jump from "almost happy" to "totally good" with my sound has been to free myself from any conventions of "tonal purity" or what you should do or what a real player would do.
So what do I mean by that? Well, a lot of players just put way too much demand and expectations on individual pieces of gear. The best example I can think of would be when the total brain geniuses over at The Gear Page when they say stuff like "if an amp don't sound good in a simple [ guitar -> amp -> cab ] setup with all the knobs at noon, then it ain't a good amp" and other idiotic nonsense, as if their entire vision of perfect tone must reach them with zero effort or tweaking or any actual understanding of guitar gear or tone, but instead it should just one day magically appear in front of them in the form of exactly one simple and concise amp-and-cab setup with exactly 3 knobs and no scary thinking required that will sound perfect to them in every situation now and forevermore, like they actually think the path to perfect tone should feel like Excalibur falling out of the sky and landing at their feet or something, and suddenly their troubles are over. And you wouldn't plug an OD pedal into Excalibur, would you? Why, that would be cheating! How impure!
Basically, I'm saying once I allowed myself the freedom to just do whatever it takes to get the sound I want, suddenly new paths opened up that really did take me where I wanted to go. Like if I find that a rig sounds best with a boost, three EQ's, two compressors, and 14 blended IR's, then that's what I do. You can bitch and moan as much as you want about it, but sorry I'll be busy over here soaring over mountains with tone of the gods or whatever.
Notions of purity aside, as for the gear itself, it also helps to have a collection of stuff you can rotate through when you get bored and want some variety, as everybody naturally kind of does. Stick with an amp or three for several weeks / months / or even years if you particularly love them, and then if you get bored with something, go to your collection and swap something out for a while. After all, you were happy with it for weeks / months / years! It's not like you hate it now, you just need a palate cleanser for a while is all. What I'm saying here is don't be so quick to sell your stuff. Sometimes you just need to set it aside for a while. If you've ever bought and sold a piece of gear more than twice then I'm looking straight at you.