The baby won't always wake up at night. It seems impossible to see the bright side of sleepless nights, but when you wake up and the baby sleeps through the night, you may find yourself staring at the sleeping face and missing your time together.
When your house is a mess and there's toys everywhere you will know that at some point that too will be over. They will play at friends houses, or outgrow the hours spent playing mommy to a doll and trying to be like you, or racing cars around dreaming of the day they can drive like daddy.
When you just can't keep up with all te activities plus the housework and make time for yourself, remind yourself that one day they won't want you to go with them. Soon enough they will be driving themselves around and your quiet house with lack of clutter will make you as sad as the mess does now.
The truth of it all is that every phase of parenting, like every phase of life, changes and you will grow with it. It won't always be like this...