You have to be supremely organised. How long is your commute to work? What is your childcare arrangement? Really think about the most efficient use of your time, for example one of my colleagues lives a long way from work so she's been up for 3 hours before she gets to the office getting herself and 2 kids ready, getting to Nursery for 7.30am and then driving to work for an hour - for her it was more time efficient (and not much difference financially) to hire a Nanny.
Don't sit down to watch t.v or go on Mumsnet until all the jobs are done for the evening otherwise you'll never get up to do anything again during the evening!
Everything out and ready in the evening for the next day - your clothes, DD's clothes, DDs nursery bag (or equivalent), your work bag etc.
Buy a year's worth of Birthday cards and a few generic ones like 'congratulations' etc so that you don't have to constantly go to the shops for cards. Must admit I am v sad and also organise a years worth of pressies, mostly stuff bought in the sales and put up in the loft, or atleast I'll know what I'm going to but people and when I need to get it.
Put a load of washing on before you go out in the morning. When you get home tumble dry what you can, take it out and hang it up immediately - you won't need to iron it which takes up a lot of time.
Get a cleaner if you can afford it. Even 2 hours a week to whip through with a duster, clean the bathroom, hoover and mop would make all the difference.
Menu plan, shop online, batch cook and take out what you're going to have for dinner from the freezer and put in fridge in the morning, otherwise you'll get home, be too knackered to cook and will eat crap!
Always try and stay one step ahead of the game, if you or DD get poorly it's scary how fast even the most organised home starts to unravel.
If someone (friend, DM etc) offers to have DD for a few hours or a day please take them up on it and do not spend the day doing chores. Spend the day on yourself doing whatever is your idea of fun - exercise, shopping, movie, haircut etc. You have to have time to yourself otherwise you will burn out.