If you have trouble drinking water-I know a lot of people don't like the "plain" taste, try adding a squeeze of lemon  or a splash of natural fruit juice (with no added sugars) to your water bottle.  Non-caffeinated herbal teas are also a great option, hot or cold.  Pureed vegetable soups such as butternut squash, carrot, or broccoli are also terrific way to add more fluid (and veggies) into your diet. Most fruits and vegetables also contain a good amount of water as well-all melons, bok choy, apples, oranges are some good examples. 

Some people also complain that when they drink a lot of water it makes them feel bloated or nauseas.  In this case, try not to down a glass of water all at once-take small sips throughout the day.  Also, don't drink too much water on an empty stomach, which can lead to the bloating and nauseated feeling some people get.

Most of all, pay attention to your body's signs for water and thirst. A lot of us get thirsty, then get so busy we ignore the sensation and simply forget to drink.  Keeping a water bottle on hand throughout the day will encourage you to drink more.