For those of non tropical countries that are really scared, there are some tricks while you have it. First and foremost: drink insane amounts of water. Dengue will take all the water out of you thru its constants diarrheas. You need water more than you need food, drink more water. You will have very high fever, control it with meds but be aware that it won't go away. You will have pain in the extremities of your body (fingers, hands...), you can try to mask it with meds but you learn to live with it for a while, makes it hard to sleep.
Here in Brazil we have something we call "Soro Caseiro" which everyone learns to prepare at home, its one of your main ally against dehydration. You mix 1 liter of water with 3.5g of salt and 20g of sugar. You drink this to prevent dehydration or in the initial phase of your dengue. If things get really bad, you will need a hospital.
On my personal experience with this nasty disease, I've found that drinking Pedialyte helped me a lot. You may think it is dumb to drink baby fluid replacement med but it works and doesn't taste as bad as "Soro Caseiro", here in Brazil we have Pedialyte flavored like orange juice, so makes it easier.
Remember dengue is a bitch and can be very serious. When you get it, you need to see a doctor. All the tips I've placed above are useless if you get the more worrisome types (which are more rare), so go see a doctor.
And remember: don't despair