Find drinking that much water really difficult so I have to think really hard and often about it - doesn't help that i don't like plain water very much either! But what I do is u take a bottle of Water up to bed with me 75cl then as soon as I wake up n when I am getting ready my aim is to finish it. Then another one in car on way to work , then another one with my lunch, another 1 in car on way home, then another with my tea and there you go 3 litres without knowing it too much!!! And as I am drinking it this way I am sure there is always a toilet close by!!!!