can i do it...i am not sure i am strong enough??

annie has been screaming in her crib for over an hour now.....while izzy has never had great sleep habits she has at least not given me much trouble at nap and bedtime (except the past week or so). annie however, while she has for the most part slept through the night since being 8 weeks old does fight nap time. she doesn't just fight she protests it by pulling my hair, scratching my face, pinching my arms and neck all the while i am trying to rock her. because of this izzy has been laying down on the couch to nap....which she does very well. i am trying to eliminate the morning nap so annie is even more tired for her afternoon nap but it does not always work. like yesterday she was asleep in three minutes both for a nap and bed but today, well, it took a lot of crying. now i am not one of those parents who run to my child every time she cries, but it really puts me in a foul mood to listen to her screams. funny thing is....i used to let izzy cry it out at night and for months she had to cry for up to an hour several times a week. with her cries i could sit in the hall and watch the timer to the moment i could go in and comfort her. but with annie her cry is different it gets under my skin and crawls up and down my back. it is louder and stronger....
what really sucks is i read "healthy sleep habits, happy child" twice before izzy was born. i was determined to encourage and follow healthy habits for sleep from the get go....but, i was so exhausted with work that i could not stick to the routine. (i worked the day i came home from the hospital) and many times since we have (or i rather) stopped our bad habits and moved her to her room and bed. at annie's age izzy was sleeping in a toddler bed all night in her own room. (i would never dream of taking annie out of the crib) anyhoo....i could go on and on...
my point is to publicly declare my one and only n.y. resolution....get both my children into a sleep routine at nap and bed time. i think i need to start with one and then move on to the other and breaking annie will be harder so i must start there. i am open to any and all comments/suggestions. for the next 3 days i am going to re-read the "master" book of childhood sleep and pump up for my emotional roller coaster to come. tata for now.