calibrate your volumetric measuring device and USE IT!
There was one time I didn't do that, just eyeballed my volumetric measuring device. After I recovered, I discovered that it held half again as much as I had guesstimated. Yep, instead of 20 oz. (imperial pint) it held 29.5 oz. So my 3 pints/hour (60 oz) to get and maintain a pleasant buzz, resulted in getting 4.5 pints/hour, which had me fairly
schicker after an hour and a half. And lucky I could find the floor after 3 hours. Fortunately, it was only a 200 yard walk from home to the party, and I guess about an 800 yard stagger from party to home.