We're right in the middle of this too, with our 6 month old. I have read just about every book out there on sleep, and tried several methods. We first tried the Baby Whisperer method, and it literally ruined our lives for three weeks... trying to "pat/shush" her to sleep while she screamed her head off! I would love to be able to rock my baby to sleep, but it DOESN'T WORK! I rock her and she screams. It seems no matter what we do, she cries when it's time to go to sleep. She goes to day care, so there's not much I can do about the fact that she takes only 2 catnaps all day. We are SO tired, it feels like my life is a movie that I'm watching.
We let her cry it out at night, with no checks, because the checks just set her right back to the beginning, making her scream even harder. It took three weeks, but then she started going to sleep on her own! She still woke up 2-3 times at night to nurse, but I was happy for that because she used to wake every hour. Now she has a little cold and is back to waking every hour, so I guess we may have to do this all over again.
Anyway, I'm bummed to hear this is still going on for you with a 13 month old ;) And I wanted to point out how unique all babies are. The "no cry" solutions (I like to call it, the "no sleep, cry solution") don't work for all babies. For mine, apparently, nothing works.