Berocca in a pint of water, followed by about 5 Mr Freeze cool pops!
alternatively find somebody who is more hungover than you - that ALWAYS makes me feel much better!
I'll second Berocca and also recommend 2 solphadene (sp). Depending how your stomach is a fry up or a curry might also help. Chocolate has also been know to work. Time and sleep is the best cure, today might be a write off but tomorrow you should feel much better
dioralite, you can get from the chemist is highly recommended by a colleage of mine before you go to bed, too late in this instance for you but I will be dropping off in the chemist for mine this afternoon in anticipation of tomorrow morning, thanks for the reminder.
Recommend the Berroca also and find it most effective if taken before going to bed or else during the night! Also some soluble solpadeine and plenty of water. Also find eating salty foods helps i.e crispts or chips with loads of salt. Plenty of sleep helps too if that is an option!