A simple system for never running out of ink again

Nobody plans to run out of toner, which is precisely the problem. The cartridge fails on the morning of the big print job, and the replacement is two days out. The fix is unglamorous but reliable.

The rule is simple: every printer has exactly one spare cartridge sitting next to it. When you install the spare, you order the next one. That single habit turns a scramble into a shelf swap, and it caps how much cash you have tied up in supplies.

Cartridge model numbers are easy to get wrong. Rather than eyeballing it, look up the exact match by your printer model so the spare on the shelf is the one that actually fits.