Everyone has issued gread advise on tools/equipment to add.

You mentioned that she is an "indoors" type of person, therefore, I would add some simple instructions with pictures. You could scan things from manuals, and drop these pictures into a document on the computer. Add your own text, and then take the pages to Kinko's or the local library to get laminated. Maybe add a ring to keep the pages together, and she'd have something to fall back on if TSHTF.