getting a 15 month old to sleep

help???
need help getting my 15 month baby to sleep,

Turn off all the lights and lay with them
Make sure they are full before bed and have a clean diaper
I dunno, that's the things I do with my 14 month old.

tried that she is breastfed and for the last month been trying her in her cot and a bottle but she just screams place down

first try letting her play in it. get used to it. then try putting down in it for naps. Then work on bed time. make it happy and fun, not stressful. We just got our almost 2 yr old ( in may) to sleep in her own room/bed after all that time co-sleeping. she still ends up with us sometimes around 3-4am. But she goes down in her bed/room by 10pm