To help keep my currency organized, I keep the main orbs in a vertical stack on my first stash page, on the right side. This not only keeps them tidy, but serves as a list for how they progress so I don't have to keep
loading the wiki for it. Text version under the cut.
Orb-Alchemy
Orb-Regret
Orb-Scouring
Orb-Chance
Orb-Fusing
Orb-Jeweller's + Orb-Chromatic
Orb-Alteration
Orb-Augmentation
Orb-Transmutation
Portal Scroll
Wisdom (ID) Scroll
This column is 11 squares high in-stash, so there's room at the top for the occasional rare orb, like Regal Orbs or Blessed Orbs. (each stash page is 12x12) Any extra orb stacks just stretch left, usually only occurring for the scrolls and low orbs. Quality upgrade orbs like Armourer's Scraps and Blacksmith's Whetstones usually hang out top-center-ish. The whole left side is basically just intake; currency fragments, interesting jewellery, a rare item or three. When intake rubs elbows with the top-center stacks, I put orbs on their stacks and sort everything else to its place on other tabs.
I can't really speak to the trading concerns, as I've been playing self-found... Also, I threw a bit of money at stash tabs, so the way I use my ~20 tabs is a bit different than someone with only the default 4 tabs. That said, the organizing column is still useful even without a lot of spare space around it.
... and 2) I get stuck in that "saving it for later" mode where I don't want to use any of my orbs of fanciness at e.g. level 40, because then I won't have them for my end-game gear at level 100 (ignoring the fact I'll probably alt too much to ever reach level 100).
I tend to squirrel mine away too, don't feel bad. I don't hoard them for end-game, as I've only made it to A2 Merciless (and only with one character). I bust out the orbs whenever it feels like I'm taking too long to kill things, or I find rares with crappy mods but decent base stats that get serious consideration when compared to my current equipment. I've definitely poured more orbs into making weapons than anything else, with improving my sockets/links a close second.
I'm in... Domination, I think it is? ....
Then I'm of no help... I haven't even killed Brutus with my goofing-off Scion yet.
Still dirt poor in Domination, and that may not change until the semester is over.