By the above, I mean profit creatively, not financially. One reason to keep old work around is that it not only gives you benchmarks for where you’ve been, it also informs your present work. Sometimes it’s inspiration, a kind of creation recycling that sparks new ideas from old. Some of the time, it steers you away from habitual mistakes. These things are worth experiencing and knowing.
Sketchbooks are the main thing artists keep. But as much as you have room for isn’t a bad thing to hang onto. Dominic Cretara, my main life painting professor, used to say we shouldn’t throw out anything for at least three years. By that time, you’ve progressed—if you’ve kept working, of course—and gained perspective and new skill.
Don’t look too soon at the bottom of the pile, but do look.