[jerf]

I had some success systematically reducing it over time rather than cold turkey. YMMV. It may feel silly measuring out coffee and reducing it by just a small bit every day but it's worth it to avoid the fully withdrawal symptoms.

[diydsp]

+1 Titration works. E.g. blending caff and decaf.

The "cup" measure of coffee is a blunt quantization. My ideal amount is approx 3-4 oz.