We never cracked it with the first two (much older) dcs.
We used to have to go down to the kitchen and prepare and it took agggges and was a nightmare.
I need my sleep. It's the only way I'll cope.
I'm thinking of bulk buying cartons of pre made formula and sleeping with them inside my pyjamas, wedged between me and DH, in my bra, whatever works to get them to a nice warm body temp!
Then just crack open, chuck in bottle, shove in baby's mouth. No having to physically leave my bed 
Anybody done it this way, or have any genius ideas instead?