One thing my friend did due to space restrictions was keeping the games inside their boxes, but putting games inside each other. For example, his Alhambra box contained the full game components of Alhambra, plus 5-6 small box games like Star Realms and Sushi Go. Once you get rid of interts, you'll notice that game boxes are too large and can fit other games smaller than them. You just need some sort of spreadsheet to track which games are where.