I googled for some info on controlled crying for you - maybe looking at this you can see why people were so concerned that you were planning on doing controlled crying for a month old baby.
Controlled crying
If all other methods have failed, controlled crying is the most effective way to sleep-train babies over 6 months.
It is an intense technique and takes a lot of commitment and perseverance but can be very successful in getting your baby to sleep through. If your baby is still feeding in the night, however, it's a good idea to try the core night method to ensure he isn't crying from genuine hunger.
Start controlled crying in the evening on the first day. The same procedure should be carried out no matter how many times your baby or toddler wakes up in the night.
Day 1
Step 1 Decide on a regular time to start the bedtime routine and stick to it. Allow at least one hour for the bath, milk feed and settling.
Step2 Settle your child in his bed before he gets too sleepy. Kiss him goodnight and leave the room.
Step 3 Allow a minimum of five to 10 minutes of crying before returning to reassure him. Reassurance should be kept to the minimum. You can stroke him or say 'ssh-ssh' softly, but resist the urge to pick him up. Leave the room after two minutes even if he continues to cry.
Step 4 After the first half hour of crying, the times between visits should be increased by five to 10 minutes each time, to 15-20 minutes between visits.
Step 5 Continue with the checking plan every 15-20 mins until your baby or toddler falls asleep. Reassurance should still be kept to a minimum of no more than two minutes and he shouldn't be lifted out of the cot.
Step 6 If your baby wakes in the night, continue to follow the same plan for the evening, gradually increasing the time between visits, until you are going in every 15-20 minutes.
Day 2
For daytime naps, it is important you start where you left off in the night.
Step 1 Wait at least 20 minutes before checking your baby and continue to keep visits to him to a maximum of two minutes, with the minimum of reassurance.
Step 2 If your baby or toddler falls asleep closer to the time he's meant to be getting up, allow 15 minutes in the morning nap and 45 minutes at the lunchtime nap so he won't end up sleeping after 3pm in the afternoon. If your baby's very tired he may need a short nap of 15-20 minutes late afternoon, so he doesn't become over-tired.
Step 3 Follow the same settling procedure as the first night in the evening, this time waiting 20-25 minutes before returning. During visits on the second night, reassure your baby by saying "ssh-ssh", but don't stroke or touch him.
Step 4 If your baby is still crying after the first hour, the time between visits should be increased to 35-40 minutes.
Step 5 If he wakes in the night, you should wait 45 minutes before checking him, and you shouldn't speak to him or stroke him. Reduce visits to one minute.
Day 3
By the third day, the majority of babies and toddlers will be settling themselves at all sleep-times within 20 minutes and there's no need to check on them.
Step 1 If your baby backtracks at one of the steep-times and you have to go back to checking him, start off with looking in on him every 15-20 minutes and increase the interval until you are back to 4-5-50 minutes.
Step 2 Once your child has done a few days of settling within 20 minutes, you should be able to use the crying-down method for getting him off to sleep. Within a couple of weeks, the majority of babies and toddlers will be going to sleep without any fuss at all.