The ornamental design for a men's organizer, as shown and described.
FIG. 1 is a front elevational view of a men's organizer showing my new design;
FIG. 2 is a side elevational view thereof;
FIG. 3 is another side elevational view thereof; and,
FIG. 4 is a rear elevational view thereof.
The short broken lines illustrate stitching. The remaining long broken lines illustrate portions of the men's organizer. None of the broken lines forms part of the claimed design.