Avocado on Toast

Given the amount of cooking I do, I have a fairly small kitchen. Given the amount of kitchen I have, I have a *remarkably* small amount of cupboard space, and what there is is hard to utilize.

I have two of the bog-standard double-door cupboards, and those are fine. I mean, smallish, but okay. I also have one single-door cupboard that has a smallish door opening, but is set sort of on an angle. I tried to explain it, then decided to just draw you a picture. My cupboard does this:



(Since I forgot to label it, I'll mention that the door is the diagonal line of the big cupboard.)

So that's the cupboard situation. The big cupboard just kills me, though. I'd put in a lazy Susan, except that the door is so small that putting one in would mean that I'd lose over half the space in the cupboard (because, obviously, the plates could be as big as the door, and all that space on the sides would be wasted.)

My current system involves buying things and tucking them into the cupboard and resigning myself to spending ten minutes foraging for whatever I need. Surely there's a better way, right? And, um, surely one of you knows it? Because I could really use some help here.