I have a friend with a young "fussy" infant. She asks me for suggestions quite often. When she calls to complain I think that she secretly wants me to come rescue her...of course, if I was sleep deprived I probably would hope for the same thing! Not that I mind babysitting from time-to-time, it is better that she learn to calm her own baby. So this post is dedicated to my friend "R". Instead of me listing out everything I tell her, I thought I'd just post this link since it puts it so well:
Hope these ideas help! But if they don't, discuss the baby's symptoms with the pediatrician because there could be something more going on than just colic!