So much great advice. Here's my two cents. Someone else already mentioned this, but I would reiterate think of your collection as a whole. Consider how the collection serves different function/occasions and how different pieces are worn together. I use a picture folder where I add pieces for a master collection called 'my jewelry box'. It has pictures of pieces I'm interested in purchasing and I change out the pictures as different things inspire me. It helps me to visualize the collection as a whole and how different pieces work together. It can clarify what the overall direction is and where you have gaps in terms of needs. I can tell which pieces I go back and forth on because I take them in/out of the folder, and which ones have been in the folder for the longest. Some pictures in this folder have been in there for years, so I know I haven't tired of them yet and they will probably be a good purchase. All other inspiration lives on Pinterest of which I have amassed thousands of pictures. I can collect pictures of whatever I'm obsessed with there and I add one picture to 'my jewelry box'. When I'm over it or my tastes change I can remove it from the picture folder. I'm sure this has saved me thousands because I have exercised in my mind what it's like to own something over time. I take this process for custom made pieces as well by adding removing different iterations of a design/idea or my bag collection/ wardrobe.
Having said all that, your taste in jewelry will change over the decades. As you look at more jewelry, over time your taste will evolve. My taste and needs when I was in my twenties were different than now in middle age. I was drawn to more simple, delicate and 'classic' pieces, but these days those pieces would get lost on my now bigger frame and are boring to my eye and fiddly to handle. My personal taste has evolved and I'm more interested in custom, bolder and more colorful pieces. I'm also more confident and care less of what others think if I personally love it.
BTW, the 'jewely box' is still evolving and I don't have anywhere near most of the things on the list. Maybe, I'll get to 'content' before my time is up, but I accept that I may never get there and should enjoy the process.