Read all you can about baby and toddler sleep issues BEFORE THE BABY ARRIVES (you'll be too tired to read afterward).  Everyone said I would be tired but I was in NO WAY prepared for such severe sleep deprivation!  The books I recommend are: Sleep Solutions for your baby, toddler and preschooler by Ann Douglas and The No-Cry Sleep Solution by Elizabeth Pantley.

Sleep when the baby sleeps - it is your only chance!! Sounds simple but when it is ‘til light out or you want to catch up on email or clean the dishes . . . [sic]

You will be really tired and yet still be able to function. For the days you can't…don't be afraid to ask for help.

If your baby isn't sleeping through the night by 6 weeks it's more than perfectly normal.  My DS is 5 months and he is far from sleeping through the night.  He gets up anywhere between 2 and 5 times to feed at night.  People tell me it's not normal, but after being on TP and reading everyone else's sleep woes I've learned that it is very normal. 

Don't try and be super mom.  Housework will always be there tomorrow, your baby will only be little once.  Try and catch a nap in the afternoon when baby is sleeping.  If baby doesn't wake up until 9:30am get up when baby gets up.  Try and get as much sleep as possible because it's all interrupted sleep.

Your baby may not sleep through the night for a long time -- and that's okay.

Sleep when baby sleeps.  It's far more important that you rest and take time to relax rather than cook, clean house, etc...  You have nothing to apologize for if your house/routine isn't what it used to be!

Sleep when baby sleeps, or shower, don't worry about anything else, take care of yourself.