This is how I do it: I poke a lemon with a fork a few times, put in a bowl, and nuke for 1 minute. Then I cut it in half while still in the bowl so that I don't lose any juice on the cutting board. I squeeze half of the lemon into a 16 oz glass, and fill the rest with hot tap water (as warm as you can drink it). I just tip back my head a chug it as fast as I can, after all warm water is easy to drink fast. I wait about 1/2 and hour, then repeat with the other half. Heating the lemon gets all of the juice out of it, and drinking hot water will help with retention faster than cold water will. I do it about 10:00 am. That way I have the whole day to get rid of the water.
"Whether you believe you can or believe you can't, either way you are right."