to make the dome everyone is talking about, take a clear soda bottle, either 2 or 3 liter, cut the bottom off, so it will sit around your plant, level. Leave the top off the bottle, essentially, so it is open at the top. place this over your plant and it will increase the humidity.

Tray watering: A tray is a saucer of distilled water that the pot sits in. You should re-frill the tray with water every day it goes dry, never letting the soil dry out. (using a tray that will fit inside your soda bottle is also a very good idea.)

OK, as for watering it with tap water the first day.

Do you have hard water? Soft water? is it softened? (with salt?) if it is softened with salt, flush your plant with 1 gallon of distilled water. Salt is deadly. otherwise, flush if desired, but you probalby shouldn't worry to much about it if the conditions are corrected, and your are using distilled water now.

TO flush, hold the plant over the sink, and pour slowly, 1 gallon of distilled water through the pot.