I can only assume that everyone else thinks owning a multimeter is so obvious that they don’t feel the need to list it.
Multimeter - obviously! Screwdriver set Spanners (double ended, ring, adjustable and Allen/Hex) Tape measure and spirit level Stud finder Drill and impact driver A pencil
@SuperTyke you're overstocked as it is. There are only two things you need for any DIY problem - WD40 and gaffer tape. If it doesn't move and it should, spray it with WD40. If it does move and it shouldn't, stick it down with gaffer tape. QED.
Based on this thread alone, I thank you. I've just sent off for a Bradawl I've always needed one, but for the life of me never knew what they were called so relied on using a precision screwdriver lol