I tend to wake up after a night of drinking feeling ok for the first little while. I continuously fall prey to the 'oh wow! i'm not hungover!' misdiagnosis. After years of going out, I still have not managed to clue in to the fact that it just hasn't hit me yet. I NEVER get mild hangovers. I become completely incompacitated to the point where even lying down is uncomfortable and the thought of water makes me nautious, as do the reprecussions of shoving a glass of water down my throat regardless. I usually end up in the bathroom again. Because of WATER!!!
I wish I had the presense of mind to drink water when I get home. But usually I find my way to my bed and collapse.
The only cure I've found that works, really only works for me once I'm in the post-dizzy/nautious stage of my hangover (so, usually for me, around 1:30 in the afternoon). I drag my butt over to the 7-11 around the corner and get myself a large slurpee. Don't ask me why but that ALWAYS clears up all of the remninants of hangover (usually lingering extreme headache and yucky belly).
And
SATX*APhi, your friends are wrong. They were probably bothered you were trying to sober your friend up

. Given the fact that drunkeness and hangover is caused by dehydration to the brain (seriously!), water is always the best thing to have.
Cheers!