I have a 14 week old DD and do a loose kind of 'Gina-Lite' routine which works for us. My advice would be that if having some kind of routine/struture is important to you, then go for it, but I would caution against deciding which one you're going to do right now, as you might be putting pressure on yourself and a lot depends on how you cope and what your baby is like.
By all means read up a few ideas, and be prepared to be a bit flexible, and then you will discover what works for you.
Mumsnet can be a bit anti-routine on the whole, but as a new Mum I found it very useful having books and routines to hand to give me an idea of e.g. when DD would need to sleep etc. as it takes time to get to know your baby and his/her cues. As long as you don't use them as a stick to beat yourself up with then you should be fine.
Having said that, I can't imagine having had a 'routine' from day 1. The world was completely upside down for around 4 weeks, then I started to get my groove a bit. There are also all sorts of things that might make a very fixed routine impractical in the early days - weight loss, feeding issues, colic, reflux etc. so you do have to roll with it a bit. However, I'm glad I do now have a routine that works for us.
D