the thing that helps me most is keeping my closet relatively sparse. i’ve found that having a solid selection of essentials helps me pick outfits quick just by mixing and matching between layers. especially if you know what colors/cuts work for your body type and tone and stick mainly to those, picking an outfit is just a matter of checking off bottoms, tops, outer layer, shoes, etc. this method will lead to repeat outfits but fr who cares if you look good in it?? I literally have one kind of sock but just tons of pairs of it because I know it goes with everything.
obv this advice does not apply to stuff like formal wear and seasonal stuff like winter gear/swimwear that will only be worn occasionally, but keeping just the A-team selections you have and filling specific niches with what you buy as you phase stuff out that you no longer wear means you always know you look good in what you have.
tldr: if you don’t wear something, you won’t miss it. only keep what you wear