I think routine worked well for me because I want to have a rest too during the baby's nap time, and I want to have ME time in the evening after 7:00pm. My first baby was very energetic, that when she started to walk (and run) I was exhausted all the time so i needed her to sleep well knowing i will have time to recover and refresh. With the second baby I needed some form of routine so i can plan my day and spend quality time with the first, do my domestic chores and still have time to cook some decent meals, and have life. My first is 3 now and still sleeps well in the night so I can confidently go out in the evening with dh knowing that she does not need any settling. I don't know what people do if they don't have a routine?
Gina Ford's contented little baby routine is very structured, works for some, does not work for others. Worked very well for my first, but i was a slave to a routine, but I would not regret it because I found a very concise solution to every problem, from feeding, sleeping to toilet training. Being a first time mum with zero baby experience, it helped me a lot. If you need a manual for a baby, this was it.
EASY routine (see EASY forum online for advice) is more baby lead. It is also good, and it helps you to understand your baby's routine need, but there is a lot that I had to figure out by myself when things goes wrong.
Whatever routine you follow, you still have to follow it as much as you can, at least most of the week. I found keeping the nap time, and waking up time, bed time around the same time is quite crucial.
Give it a try. You have nothing to lose.