It's not hard to have at least 8 glasses per day. Just make a habit of it - everytime you walk past a sink (hygenic one is helpful), have some water...It's good stuff!
I have to admit, when I was younger, all I drank was cordial, and never drank water on its own. Then, about 5 years ago I was without access to my precious cordial for a week or two, and resorted to water...Since then, I don't think I've drunk cordial, and out of habit, drink a lot of water. So for a while, I was patting myself on the back for being so healthy, then I hear that too much water puts too much pressure on your bladder, and you can end up with a weak bladder. So I ease up a bit on the water...now I just drink as much as I want. What is up with this crazy world?