Hi Nettie. I usually manage about 5 pints of plain water a day without much difficulty, plus at least a pint of tea (at breakfast). Made myself get into the habit originally by starting with no-sugar squash and graduating to filtered tap water, now straight tap water since the water company flushed the system a while ago! I also use the one pint 'pub' glasses as I like the shape. Usually I take a couple of glasses up to bed with me and have no trouble drinking them during night if I wake, or first thing. This gets me off to a good start, then I have a pint before each meal during the day.
I don't know if this amount affects my weight loss - only started SW seriously again a couple of weeks ago and have lost 3lbs each week so far - but I find it easy to drink the water if my stomach is empty.
As I now have a hip problem which prevents me walking any distance - and I used to love walking - I don't really get much exercise at all, so don't know if I'm drinking the 'proper' amount. It feels right though, and even if I get frustrated at not being able to walk as I'd like, at least I feel the water and the SW plan is doing some good!