I work from home as well, but recently had to go on a work trip and so I briefly freaked out about having to assemble a work wardrobe in a hurry. I bought several things that would fall into the category of "fast fashion," mainly because I didn't have time to search elsewhere for more durable wardrobe basics. Was rather unhappy with my choices while on the trip and came back vowing to stick to my principles of buying for the long haul. I know that this is also a form of privilege - being able to afford better-quality goods even if purchased over a longer period of time.
On the flip side, I have noted that my clothes can last decades, with care, but needs change, styles change, and sizes (
) change (even in shoes!). I have saved some of my nicer, classic pieces, thinking that my daughter would like them someday, but now she is three inches taller than me and has very different tastes. (I'm keeping a few basics - jackets, button-down shirts, things that aren't as height-specific) anyway, in case she wants them when she's old enough to go for interviews.) We are fortunate in that we have space in our (cluttered) home to store things, but I'm trying to balance frugality with the need for space and better organization! 
Beyond clothing, I like that our neighborhood has a pretty active listserv, where people post things they are clearing out, as well as things they are looking for. So I was able to get baby gates for free when we were training our puppy, and then pass them along when we were done. Snow boots are another great example of items that are desperately needed when the occasion arises, but not much in use the rest of the time. So rather than keeping brand-new shoes that may be outgrown, folks both offer and request the sizes they need.
There are also some wonderful local charities that directly repurpose goods:
A Wider Circle sorts and then distributes household goods in good condition to families in transition. "This program provides beds, dressers, tables, chairs, dishes, pots, pans, and other large and small home goods to families transitioning out of shelters, escaping domestic violence, or otherwise living without their basic need items."
Leveling the Playing Field takes outgrown sports equipment and distributes it to underprivileged communities.
On a more philosophical note: I enjoy checking out local estate sales - around here there are a few consignment companies that allow you to review the items for sale online, so that you can target the houses you go to. They are often a good way to find high-quality things for great value (vacuum cleaners, art, lamps, furniture, kitchen goods, even clothing or gifts). It does make me sad sometimes to see how the beautiful things that people collect over a lifetime are then sold for pennies on the dollar - though I guess the good thing is that the items then go back out into the universe and are hopefully used and loved by new people. But it makes me more determined to buy only things that I will immediately put to use - and that will last for a long time, so that I don't create waste by purchasing disposable goods.
A recent article about where things go after they are donated:
https://www.theguardian.com/sustaina...hes-peak-stuff