Hiya,
I'm writing this at nearly 4am, in the middle of sleep training my nearly 12month old (she is now asleep but I can't sleep as I must be so used to being up at this time!).
I am doing CIO as having half heartedly tried various things over the past few months (gradual withdrawal / controlled crying / lots of shushing & patting etc) she just seemed to get more upset & furious when I appeared in her room & didn't offer her a feed. Also, when I did get out of bed to go in her room to her, I was finding myself just offering her boob because it was a quick & easy way to quieten her down.
When I don't go in, she is angry, but not hysterically upset - I call it her angry singing - and figure that if I don't go near here then I won't be tempted to just latch her on.
I told myself that if she cries hysterically and sounds really upset, then I will definitely go into her. Otherwise, I'll leave her to it.
So far tonight (night 1) she has woken at 10.30pm, 1am, 2.55am and 3.30am. She has fallen back to sleep on her own each time after 20-40mins of her 'angry singing'.
Hopefully it'll only take 3 or 4 nights of doing this - worked a dream with DC2 (& am happy to report that she is a beautiful sleeper now, and not at all scarred by CIO!). My DC1 has always slept well & I'm constantly analysing what I did with him that made him that way, when my next 2 have been such terrible sleepers, and the only thing I can think is that he was bottle fed whereas DC2 & DC3 have been fully BF - and its just SO easy to latch a baby on when they're grizzling at night, hence leading to problems teaching them to fall back to sleep on their own - I have been their own personal dummy!
Good luck whatever you decide to go with - you need to psych yourself up to it, and remember that it shouldn't take much more than 3 or 4 nights.
I really must get back to bed!