As someone recently/still in the same position, I have some suggestions...
1) First of all, I don't think the 'for a lifetime' mindset is helping you right now. You didn't mention an SO in the picture...what if you meet someone and you guys move in together and have 2x everything you buy yourself now? What if you get a fantastic job offer across the country (moving stuff is expensive!). What if you get a fantastic offer OUTSIDE the country? I think it's good to have stuff you enjoy using (sharp knives, good pots are priceless in the kitchen!) but you should also be willing to part with these items if amazing opportunities come along. I would look for items that you will like and that will last the 5 year range, and wait to buy 'lifetime' things until you buy a house and really settle more. So no more than $20 on that knife sharpener/stone.
2) To keep yourself from getting carried away with 'set up,' sit down right now and figure out what you think you need/want for a happy, complete, Mustachian life. Cooking utensils? Appliances? Tupperware? Tools? Sports equipment? Bedding? A pet? Put it ALL down, in the abstract (i.e. on paper or spreadsheet, not Amazon) Then go through that list and prioritize. Also figure out, at least mentally, what you would need to spend on these things. Critically consider if you really NEED the top of the line to be happy with it, or if you can be perfectly content with a $20 or secondhand version. Anyway, here's where the magic happens: I didn't get probably 3/4 of the list I came up with my first year in grad school. And probably a bunch of other stuff I might have. Because every time I thought about buying it, I asked 'is it really more important/urgent than #5 on the list?'
3) Put some of the less expensive, less time-sensitive things you want on a gift list. Give it to people who ask/care, if that is something you and your family/friends do.
4) Find a counter argument for 'it solves a problem.' Delayed FI can be one, but for smaller things, 'where will I put it?' 'when will I use it?' (at least several specific instances), or 'but I have ___ that works just fine' can be more effective
5) Don't rely on stuff to make you do things. I'm not allowed to buy craft supplies because I have like 5 projects in various stages of planning/completion right now. If I finish those, I can try some new things, but not before. If you have a closetful of fitness gear you never use, you won't use the latest gadget either. Taking a day or two to think about purchases helps realize these things.
Finally, taking a spending fast for a month or so to realize how good you've got it can be helpful, for sure. :)