Sleeplessness

It is 2am. I am on the computer instead of asleep. My 9 month old daughter cannot figure out how to sleep through the night for more than 2 nights in a row. I didn't realize how precious sleep is. It affects my whole day. I have to fight to have the energy to do anything. All I want is to sleep all night long. I don't know what else to do for her. Lord, help her sleep.