For some reason the little orchids and I don't get along well. I'm on my third or fourth one... Just got it a couple of weeks ago, and its leaves are shriveling and turning yellow on part of it, although I'm pretty sure it has enough water.
I have a big one that I got months ago and it looks really healthy, so I'm fairly convinced it is a small orchid thing somehow.
Anyway, I've always been instructed to water them using an ice cube (or multiple ice cubes if it's bigger). They like a good amount of indirect light in the house...my sister's orchids thrived in a kitchen window.
Good luck!