We’ve never been one to strictly budget, but SO and I had to take a step back and come up with a plan after we both acknowledged that we impulse buy too much on Amazon. We can afford it just fine even with a >50% savings rate, but we still want to rein it in a bit.
We’ve decided to try making a joint wishlist (both are contributors). Whenever we think of something that we think we want or need, we add it to the list. At the end of the month we’ll look at it. Each item gets reviewed and deleted if no longer wanted/needed, added to the cart, or pushed on to next month’s list for reconsideration.
It does help to see everything in the cart at once to decide if it’s really worth spending that much.
Even if you can afford it, from an over consumption perspective it's great to be conscious of what you are buying and if it is something you actually need/want.
I'm the sort to over research everything I want to buy. A lot of the time, it convinces me I'm fine with what I have. Others, it makes me confident that I am getting the best value for what I am purchasing. There's really no downside to waiting a few weeks to decide on a purchase.