provide enough depth to put upright divider drawers (on back of bench and under wall cabinet/shelving) and tool boxes lengthwise for various screwdrivers, pliers, drill bits, socket sets, wrenches, etc.
a steel plate "somewhere" on the surface at
least 2'-0" x 1'-0" x 1/8" or thicker...
...figure out where you want your:
1. vise
2. bench grinder
3. drill press
4. etc... then, provide backing as required to hold and bolt firmly...
Shelves should accomodate various tool boxes and hand tools.
Upper shelving for smaller stuff, i.e., smaller hand tools, tapes, weller kits, torches/propane, glues, paint brushes, staplers/staples, etc.