I've used wake-to-sleep twice, once when my dd was about 11 months and again when she was about 23 months. For three nights I went in exactly 1 hour before her regular wake time (in her case, she woke up about 5:30 this most recent time, so I went in at 4:30). It's important to go in at the 1 hr before mark, so if you can't wake yourself, use the alarm. Gently resettle your lo (when she was younger I pretty much got her up and then put her down, this time I just very gently resettled her, otherwise she would wake for the day at 4:30!) Do this for 3 nights (4 max if there doesn't seem to be a change by the third morning), and see if it works. Good luck! It has definitely helped us.