Recently, my colleague David Faraci posted a "flowchart" for metaethics
on PeaSoup, and he impressed on me how much useful feedback he received. Not long ago, I composed something analogous for mereology, and was hoping to get feedback as well. (I realize my "road map" is incomplete, e.g., it does not address growing block theories, though I am hoping to revise it in the near future.)
The document is at: http://www.unc.edu/~tparent/Identitymap.pdf