I hesitate to do this, as I'm afraid I won't pay the mortgage this month, but it's a way to introduce useful tools to everyone.
Posters should show pictures and links to vendor sites.
Mine right now is the Tenba messenger wrap, comes in three sizes, and can protect anything from a small lens to a laptop. Ideal for tossing some gear into a messenger bag or trekking backpack, or taking up the wiggle room in a Pelican. The 16" size is perfect for pro bodies and lenses up to the 100-400L. About $12. B&H Photo.
Photo courtesy B&H.