Tapering down using Caffeine pills (nodōz) has been really effective for me multiple times in the past.

I have found it tricky to find a good starting dose, and it gets a bit difficult to break tablets into very small amounts (1/10th pill) tapering down near the end. https://news.ycombinator.com/item?id=46417034

I would never try cold turkey again due to nasty headaches.

I've done it linearly over some weeks, but if anyone has tried non-linear tapering I would be interested to know what worked for you.