u can rock her to sleep, wait for ard 15 mins then carry her and put her in the cot. i do that to my 3 mth old. or put her in the cot as soon as she is sleepy, dim lights, no noise, no talking/singing/humming, this for her to slowly understand tt these conditions equals 'to sleep'. lots of trial and error of course, what works for one parent may not work for another. im sure u will find a way that will work for your baby soon.