Do the people asking you this actually have kids of their own...? 
Based on my experience, I wouldn't try and decide on anything hard-and-fast as it can be too pressurising and lead to disappointment. It's all very well deciding you're going to do Gina Ford to the letter, but if you have a baby who's unsettled/refluxy/colicky/not a great sleeper/a poor feeder it simply won't work and it can leave you feeling a massive failure. If you have one that follows the routines as if they've read the book themselves, they probably would have done it anyway
(if this happens please do not smugly tell other parents of newborns how easy it is - you will risk instant strangulation)
Similarly, you might decide on doing attachment parenting, then realise that your baby hates the sling, you and your OH can't get a wink of sleep if you bed share, that breast feeding isn't for you...I could go on.
Some babies won't take a dummy and don't need one; for others it is the only way to soothe them and save your sanity. Some will drop off in their moses basket and sleep contentedly from day one, others will want to sleep on your shoulder or in your bed and that's that.
I think the only thing to do is to have an idea about how you'd like to feed the baby (breast, bottle, mixed feeding) then make sure you understand the mechanics of that option and are prepared (i.e. have the numbers of the local BF counsellors and/or know how to make up a bottle, sterilise or express, all that jazz) and you've thought about plan B if your preferred method doesn't quite work out (I guess this applies to breast more than bottle). Pretty much everything else you can work out as you go along depending on the temperament of your baby.
I really laugh now at the rigid ideas I had before DC1 was born - it all went out the window! With DC2 I'll see what he's like and try to nudge him into a routine that suits family life, but with no preconceptions.
Good luck!