Thankfully, I don't have too many records (yet). Since the arrival of my RCM I've bought a new rack and only cleaned records go in it. This has prompted me to incorporate a new filing system - which since I now only play clean vinyl - helps me re-think my ordering system. This new rack is my "go to" rack. I've always had a go-to spot as well as newly purchased spot, with the rest of my collection stored in two different racks via alpha filing systems. One rack containing old LPs that I've had for 40 years and I bought as a kid and the other rack containing new music (indie labels et al).
I'm slowly moving away from that and into a genre-based audiophile only (they have to sound very good to get put on this shelf) system: 1) Favorites (Uncle Tupelo/Son Volt/Jay Farrar/Wilco), 2) Indie, 3) Minimal male vocals (aka acoustic), 4) Classic Rock, 5) Punk, 6) Female Vocals (folk/folk-rock), 7) Ambient/Electronic
So far I've only cleaned 54 of 1200+ LPs so this system is easily referenced and organized, but expanding. The above groupings will stay with additional racks added as needed to accommodate the genres (aka moods). Blues, jazz and classical will eventually get their own section too but it's been a couple of months with my RCM and I have yet to clean any.
This is a long winded way of saying I categorize by genre/mood.
I don't need labels or dividers to tell me where everything is because I'm very intimidate with my collection sections - visited daily with the most recent played on the right going left.