M.C.
Have her climb in bed, tuck her in. Read her a quiet book. One kiss
For the first few nights, you could stay with her till she falls asleep, or just walk out the door. If you stay, no talking.
If she cries that is okay. You know the difference between her 'I'm in trouble' cry and the 'come back cry'. It's okay. She may cry for a few minutes. If she is still crying after 15 mins, check on her, but don't enter the room.
We also would put a baby gate across the door. If she got out of bed and played for a few minutes that was okay (depending on the time). If she fell asleep on the floor, that was okay too.