What product/item/thing have you found to be completely incredible? Life-changing, even? Something that you lived just fine without before you found it, but have now realized just how much better life is WITH it?
One of mine: Switching from plastic shower curtain rings (the kind that click into themselves) to hanging metal hooks. The time, frustration and shoulder pain from the former made my life a living hell compared to the ease of the latter. Plus they look so much better.
Yours? (And don't say Viagra.)