First let me say welcome. I'm not sure what you are asking about trying as far as techniques. If you are talking about Baby Whisperer techniques for sleep such as Pick up/ Put Down, it is never too late to start. If you are interested in that, I would buy the book to get familiar with it before trying. Also, the Pu/PD board here is fantastic for info and support. Also, just to clarify, you say your LO CAN or Cannot self soothe? If she can self soothe, well that is half the battle, you just have to find the right routine that works for you. If she cannot, that is when you would need to imploy techniques such as PU/PD in order to teach her to fall asleep independently.