1. Be sure to subscribe to one of those weekly email updates which describes your baby's growth in fruits and vegetables. You'll want to know what stage your chestnut or watermelon is upto, the latter being a rather painful concept to imagine in the delivery suite.
2. Invest in oversized, elasticised everything - pants, socks, bras... You name the body part, it'll expand like Violet Beauregarde in the inventing room.
3. Embrace the toilet, whether it be with your arms while you hurl your guts up for the umpteenth time, or just take in the serenity that is the bathroom. You will be in there a lot.