Assalamu alaikum ak_m_f,
It is too late for this year, but perhaps you might keep this in mind for next Ramadan. What I did this year was to start cutting back on the amount of food I ate a full month before Ramadan came. By halfway through the month I cut lunch out completely. By the last week and a half I cut back a lot on the amount of water I drank. I have found this Ramadan my easiest ever (food and drink wise), alhamdulillah!
Deus is very right in saying that fasting is a physical and mental exercise that you have to train yourself in. Think of it like a marathon, you wouldn't just put on a pair of running shoes and run 10 km without training first, why would you go without food or water during daylight hours for a month with training first?
Another way to train yourself to fasting is to fast during the whole year, say one day a month, to start, then increase to 2 days, 3 days, then on to one day every week. In doing this, fasting will get much easier for you and you will reap more spiritual rewards for it all through the year!
Being well trained at the fasting part leaves so much more room for spiritual grow during Ramadan. Try it next year and see if it is a lot better for you!
Sticks and stones may break my bones, but your words...they break my soul ~