Showed up to donate blood this morning, and my octane* was high enough to meet the requirement this time. Did an apherisis donation, so a double-shot of red blood cells.

Very magnanimous of me, since they only give you the same $20 they give for a pint of the regular stuff, and I can't donate again until after the new year. Leavin' money on the table! But I need the karma.

• Hemoglobin. Iron.