OP: something Harvs about age said sparked another series of additional hints..
While I personally think you shouldn't start worrying about routine too young (8ish weeks... After the 6 week growth spurt worked for me) there may also be an age past which I wouldn't recommend trying SOS. Not sure what it is. Trying to break established 'bad' habits in an older baby (8-10 months?) is a hell of a lot harder (more tears - not my cup of tea) than just starting from scratch and encouraging 'good' habits in a 2-3 month old. So my advice is to do your research now (as you are) but not wait too long after bub arrives before putting things into practice.
Even though I don't recommend a routine for a very young bub there are things you can do at an early age to encourage 'good' sleep habits:
- introduce a breathable comforter with your smell on it and use it at every sleep, but only at sleep time
- try not to feed/rock/pat bub to sleep. In the early days it is hard but if you can stop feeding/patting/rocking when bub is drowsy but awake, that's a good start to self settling
- try to avoid using a dummy past 6 weeks. If you do use a dummy try and wriggle it from bubs mouth before bub falls asleep (ie while drowsy).
- wrap/swaddle bub
- for the first 6 months try putting bub to sleep in a different place (not in cot/bassinet) for one nap a day (eg for the 3rd late arvo nap I used to put my boys to sleep in their rocker chair).
That's all for now... Better help hubby he's been sorting the household duties out while I bludge on BH and I think he's starting to get cranky!