Found this image on Pinterest and thought to share as it seems really helpful! Encourage you to drink every last drop.
"Use a permanent marker on one or more of your water bottles to give yourself water goals throughout the day. Keep it at your desk, in your car, on the counter, or wherever else it’s handy and sip on it during the day, trying to stay within your goal. This will give you an idea of how much water you’re drinking and what times of the day you tend to not get enough."