I’ve been deep into shonen and seinen for years, and keeping track of my manga was a mess. So I set up a sites.google profile sites.google profile to list everything. It’s simple but gets the job done — I can share my shelf with friends who are into the same arcs. The only downside is the limited layout options; I can’t sort by mangaka easily. Still, for a free tool, it beats scribbling on paper. Lately I’ve been updating it with my favorite OP/ED rankings too.