I've noticed that I was able to drink alot more water when I drink it at room temp. Also, it helps if the container has a wide mouth.
Another suggestion would be to add Crystal Light to your water, and gradually reduce the amount of powder you put in your water.
You can make a little game where you start drinking water and count how many seconds you can go without stopping. OR you could mentally think, "Chug, Chug!!" like in college
(that last suggestion sounds pretty dumb.. but its helped me drink more water!