When you think you might like something, some questions to ask might be:
One, do I have this already? It is probable you do. Two, if I don't and it would be nice to have, to I have to have it NOW? Can it wait a week or two? Three, Fine, I could use it, and now. But do I have to get it HERE? Is there a cheaper or better source for this item?
Just a thought.
I would be careful of having too many mirrors all over the house. I would be careful of having full length mirrors, especially the kind where you stare at yourself close to the mirror. A full length view is better from at least ten feet away.
Stores are designed to be pleasant, female, environments. Make your home like that. Invite nice women over for tea and relaxing.
Get more expensive stuff. It is better to have few things that are really nice than a lot of stuff that is almost nice. You may be shopping too much because the things you are getting aren't doing it for you, because they aren't expensive enough.
It is CORRECT to get new clothes for a new job because there is a natural desire to have exactly the right image for that particular environment. Almost won't do it.
Try to get a lot of the same colors. Some people favor a lot of black, a lot of purples, with bits of other colors, and maybe white near the face. That way your stuff all goes together.
Remember people don't want to be amazed. They want an excellent image that is consistent. If they have to stare and re-adjust their ideas about you all the time, it makes them nervous. They wonder who you are, anyway. This is scary and annoying. Settle on an image and pretty much stay with it. More or less.
One pair of perfect earrings should be worn all the time. I knew a woman who looked nice in small gold earrings, and had fifty pairs, and it was a different motif every day, and it was dizzying, not pleasing. Get it right and stay with that.
If you have a garment that is absolutely perfect for you, get a lot of them, the same. Maybe that garment in all the colors it comes in, or most. And three of it, in black, or grey.
The idea is to look good, not to entertain people with variety.
People should have a vague idea you look great without being terribly aware of exactly what you wear. They say the men look good if nobody remembers what they wore. There is a female version of that too.
Do NOT look as if you are trying too hard, and wearing a ton of supposedly interesting things that change daily or weekly can give that insecure impression.
Do your agonizing and deciding before you buy. Getting dressed should only take a few moments of intense thought about the weather and what's up today. After that, dress quickly, and never think about your clothes for the rest of the day, not at all.
This stuff is hard but it has to be done. Good luck.