I have an 11 month old baby she constantly cries thru the night. i guess poor sleeping habits? can she just cry it out ? or is that not healthy ?

Cry it out: Nothing wrong with a little crying out. Use the ferber technique. Give the baby 20 minutes, then go in, soothe and leave again. This way baby will learn to soothe himself/herself

Sleep: it is important to establish proper sleep routines for an 11 month old. You mention poor sleeping habits... what do you mean by this? This is a great question to review with your pediatrician who can provide insight on your child's specific nighttime/sleep routine. There are many factors which go into getting an almost 1 year on a sleep schedule.