Minimalist Core Trick
You may not self-identify as a "minimalist", but its #1 lesson is general.
Here it is: Pick what to keep, not what to discard.
There's an 80/20 principle at work in most areas of life. For example, when decluttering, it's obvious which are the worst 20% and the best 20% of any collection, while the stuff in the middle takes effort to classify, sometimes extensive soul-searching.
If you try to declutter by looking specifically for "what you don't need", you'll wind up throwing away 20% and then of what's left, 20%, and then 20% of that, and so on.
Out of the original collection, the absolute fraction you keep slowly drops from 80% to 70% to 65%… in a process much slower than the opposite: picking out "what you definitely want to keep". Then right off the bat, the absolute fraction is down to 20%. This skips a lot of navel-gazing and soul-searching.
A different application: when cleaning your To-Do list, don't analyze each and every item, don't decide whether or not they still need doing. Just pick the few items you definitely, clearly need to do, copy them over to a new list, and forget about the rest.