They need lots of nitrogen. If you have some mature compost, that'd be perfect. If not, then quarter-strength Miracle-Gro (all-purpose, for veggies, or for tomatoes...all will work), a day or two after you plant them, and again maybe every two weeks until they start to set buds. I use a gallon per plant, sprayed on the leaves and poured on the soil.
Once they're four or five feet tall, remove the foliage (carefully) from the bottom foot or so of each bine. This will discourage mildew and (to some degree) aphids.
They need lots and lots of sun, the more the better.
Keep them watered so that they never start to wilt. (If they do, it's not the end of the world, but try to anticipate watering needs before that happens.)
Water them early in the day so that they'll be dry by dusk. This also discourages mildew.
Any time you notice the leaves aren't as dark green as they once were, give them a quarter-strength Miracle-Gro feeding.
You can plant marigolds around them to discourage unwanted bugs.
This year, let them grow as much as they want -- side shoots, new sprouts, everything. You want them to use all the foliage they can to collect sunlight and make roots this year. You probably won't get much (if any) of a harvest this year. Next year, when the bines come back up, cut all the shoots except for the best-looking two to four, back to the ground so the plant can put all its energy into growing two to four nice strong bines.
(This is all based on my personal experience...I'm sure there are other opinions.)