Almost everything I buy works great. But I also do a lot (sometimes months) of research before I buy anything. I like to ask my friends what they have and how long they've had it/how they feel about it. If I can, I borrow things and try using them a bit before buying one for myself. I keep an eye out for clever design and quality materials. I often come across low-quality products and I elect not to buy them. I try not to get myself into situations where I "need a carrot peeler on short notice," but if I do I definitely start by calling around and seeing if any of my friends or neighbors has one I can borrow.
Sometimes I end up paying much more than the cheapest, or even average priced analogues on the market, but probably not as often as you might think.
The market produces to fill demand, so I vote with my wallet for the types of products I want to see in the world.
I drive an old car that pollutes more than a newer car because it already exists and I'll never save enough carbon in emissions to make up the cost of producing a brand new hybrid vehicle. I try to maintain my car so it lasts as long as possible. I also try to drive safely so-as to avoid wrecking it. If I live long enough I may drive a hybrid car sometime in the future (there are still a lot of old cars sitting around, though).
Sometimes I buy antique juicers and they are usually very robust and durable. Not because they're old, but because they're survivors.
On the very rare occasions that I do find myself in the market for some junk I usually have no problem finding it for free or very low cost on craigslist.