Pick a sorting system you'll actually maintain
The best system is the one that matches how you choose a game to play, and there's genuinely no single winner — it depends on whether other people browse your shelf or only you do.
- By weight (filler to heavy): the most practical for most people — you grab a game to fit the group and time you have.
- By player count: best for hosting, so you can point guests straight at the right shelf.
- By complexity: point new players at the easy shelf and keep the brain-burners together.
- By genre or mechanic: nice for browsing, but least helpful when you're actually picking something to play.
- By designer or publisher: similar box designs group naturally and look tidy on a shelf.
- Alphabetical: great if you fetch games by name to take elsewhere, but it breaks on every new purchase.
- By color: looks fantastic, but a common complaint is 'now I can't find any of my games.'

Box size is the most practical primary sort
Once a collection gets big, pure organization systems break down — non-uniform box sizes leave ugly gaps, and a new game forces you to reshuffle an alphabetized shelf. The honest majority answer hobbyists land on is 'if it fits, it sits': sort primarily by box size, skinny games in skinny gaps and fat boxes in fat ones, so you waste the least space. Then layer a looser organization on top. Packing for space first and findability second is what keeps a large shelf from becoming a jigsaw you re-solve every time you buy a game.
Decouple placement from findability (the power-user move)
For a big collection, the trick is to stop making the shelf do two jobs at once. Pack the boxes by size for maximum density, then add a grid or coordinate label system — shelves lettered and numbered like Battleship, so a game lives at A6 or C19. Record each game's grid location in a spreadsheet or a collection app, along with its player count, play time, and weight, and you can store purely by space yet find any title in seconds. Board-game bars and lending libraries run exactly this system. A lighter version is colored circle stickers on the box side that show player count, length, or difficulty at a glance.
Make spines readable
Stored upright, you read spines, but most boxes only print art there. A spine label, a printed strip, or a thin piece of tape with the game name turns a wall of identical-looking boxes into a shelf you can scan in seconds. This single step does more for day-to-day use than any other organizing trick, and it pairs perfectly with a size-based sort where similar boxes would otherwise blur together.

Put the games you play at eye level
Position beats any labeling scheme for the games you reach for most. Keep your most-played titles at eye level and nearest the table, and relegate rarely-played games and big boxes to the top, bottom, or a closet. Many hobbyists keep a 'shelf of shame' for unplayed games as its own section — a quiet nudge to either finally play them or move them on.
Treat the shelf as a hard limit
A popular discipline is the 'living library': when the shelves are full, buying a new game means selling or donating one. It keeps the collection pruned to what you actually play and forces honest choices about what earns its space. The reminder underneath all of this is that the real storage hack isn't a clever system — it's owning fewer games and being honest about what will genuinely hit the table.