Brand, thing, behavior, method, advice, mantra, etc.
I swear by Blackwing pencils.
Also, the 'two minute rule', which has really improved my life: "if it takes two minutes or less to do, just do it now; if it takes longer, schedule it." I've got untreated attention issues and it's very easy for me to notice something needing done, and overlook or procrastinate it because it seems inconvenient in the moment. Having a totally painless rule that forces me to acknowledge that thing I should pick up, that trash bag I should change, etc, or, to at least put on my calendar anything I mustn't forget in the long run has been great for me.
For me Uniqlo has taken a turn for the worse. Clothing I bought from them years ago is still in great condition. Things I’ve bought in the last year are falling apart and feel cheaper.
Seconding Uniqlo - it's also got the bonus of being sort of "effortlessly fashionable" (especially if you're a woman) which is great if you're the sort of person who gets super anxious over social interactions but at the same time have no sense of what looks good.