D.,
I'd like to add that I had a girl who was not a great sleeper. Took all her naps in my arms until about 3 months or so when I was ready to get her in the crib during the day. At night we put her in the bassinet first, then the crib, but she woke up so frequently it was like we never slept. By the time we would go to her, soothe her and get her back to sleep then get in bed and settle down ourselves, sometimes she'd be awake again before we could even get back to sleep!
For naptime, I just started putting her in the crib, first after she fell asleep in my arms and, eventually, while awake, but sleepy. At first she would only sleep short periods (we celebrated after her first 15 min. nap in the crib!), but eventually she got used to it and she slept longer.
For nighttime, cry it out worked wonders for us. I know not everyone believes in it, but it helped us tremendously. Assess the situation and your daughter and be sure everyone's ready for it (you may even want to check with your pediatrician first, as we did). But if you're going to do it, decide how (just let her cry or let her cry for a certain number of minutes, then soothe without picking up or whatever) and you have to stick to it. It doesn't work very well if you break down too quickly! And it's so easy to give in. :-) If your husband is on board with it (whatever you decide to do, both of you should agree to it) it will help to do it as a team.
Good luck. No matter how you choose to handle this, it WILL eventually get better. My daughter is almost 4 now and sleeps just fine. When you're in the middle of it, it's hard to imagine it ever being better, but it will be.
B.