I agree with the other ladies in saying to have your support lined up before baby comes.

I remember with my first bub I was a sleep deprived mess by the time I needed help, and I could barely think straight long enough to even sit down with the phonebook and try to find the numbers of the ABA or look for an LC.

With my second bub I had everything written down, had decided on an LC to call etc...but luckily I didn't need it with him.

Also agree with the point about surrounding yourself with people who are positive about it, and aren't going to infect your mindset with their beliefs of the myths of breastfeeding.
My DS is 11 months old and still doesn't sleep through the night - at least once a month someone will say to me "Are you sure you've still got milk?? Maybe the quality isn't very good....blah blah"....If I weren't confident in my body's ability to feed my baby I would've probably quit months ago!

Good luck you're off to a great start!