Hopefully some people find this as handy as I did...
Pick up an old mailbox from your
local recycling centre, tip shop, Craigslist,
Facebook freebie group, or wherever. I got this large stainless steel one for $5 from my local tip shop.
Install it in your garden, and store some hand tools in it - a knife, garden shears, twine, scissors, hand trowel, gloves, etc. It'll be weatherproof, and you'll always have the right tools handy when you need them in the garden!