After my oldest twin girls were born, I joined a mommy group that was recommended by my pediatrician and it really helped a lot. I felt like I had a place that I could go when I felt my worst to get emotional support. On more than one occasion, one of the other moms has literally held me in a hug as I sobbed over my (then) insomniac babies. I don't know how I could have survived the twin process once, much less twice without this valuable resource.
Due to social anxiety and depression (resulting from post partum depression), i was not able to get out very much to go to mom groups. So I relied very heavily on online forums for moms. This was an amazing outlet for my frayed emotions.