The choice is yours. But you are much more likely to stick with a plan that feels right for you than one you happen to find in a book or magazine. Every time your baby wakes during the night, you will need to repeat whatever you do to help him fall asleep for the first time each evening. Once you begin a course of action, see it through. Each new plan that you try means that you are asking your baby to learn a whole new set of sleep habits.
Old habits take time to disappear, and new ones time to become established.
Don't confuse your baby by chopping and changing. Stick with your plan for at least one or two weeks. He will also be more likely to sleep if you try to avoid letting him fall asleep in the late afternoon. If your baby still does not sleep in spite of your best efforts, you may find it useful to talk to your health visitor. As with any source of medical or health care information, you should as a preliminary matter satisfy yourself that the credentials and experience of the source are suitable.