My son (3.5 months) started liking and taking the pacifier at about 9-10 wks? We waited to introduce it because of breastfeeding, and started at about 6 weeks. He did not want to take if for a couple of weeks, and then warmed up to it. We use the straight nipple one -- Soothies brand.
I've just recently started implementing a "routine" -- I've only recently found EASY, but I started by reading a book on infant sleep, and my first step was to make sure he does not stay up past 1.5 hrs (his limit at the time). So, I'd say keeping the duration of awake time consistent is key. Although I differ with EASY on the first A time -- the sleep book (Healthy Sleep Habits Happy Child) mentioned that the first period of wakefullness is brief, in our case it was 45 min-1 hr.
Another thing I started doing after getting advice on this forum is to keep his meal times consistent. I don't know if it's due to my efforts or just that he's getting more mature, but he started to space out his feedings quite a bit, now they are at about 3+hrs (big improvement from 2 - 2.5 hrs). It also looks like he's taking more at each feeding. I work the naps around the meal times, but I don't wake the baby for a "scheduled" meal, just feed him as soon as he wakes up.
And (again not sure if I can take credit for it), he dropped his habit of wanting to snack before the bed time. I'm guessing that now that he's not overtired when going down for naps, he does not need the soothing of breast to calm down.
Finally, I'd suggest that you dedicate a week of (yes) staying home, so that you can be consistent about awake times, nap schedule. I was going crazy cooped up at home while I did it, but it was worth it.
Good luck! I'm sure it's a lot more challenging with a baby who'd been colicky.