This is tough, but doable.
This spring I worked 50 hrs a week at my job while studying for the MCAT-- full work day plus around 5 hours of studying per day/evening. (Though luckily on weekends I didn't have work!)
Here is my advice to you:
- Find out when you work best. Early morning? Late at night? Do the hardest stuff then.
- Exercise gives you energy and helps you remember things. I thought I was too busy for a 30 min jog, but working out gave me more energy and studies show exercise helps brain.
- Keep the end date in mind. Remember that your current schedule is not forever.
- Cultivate a support network, find people that will support you when you are feeling overworked, overstressed, etc.
- Do a few nice/relaxing things for yourself each week. For me, sometimes that was watching a 30 minute TV show after 5 hours of studying and before hitting the sack.
Good luck! You can do it!
EDIT: caffeine in the AM and a mid-afternoon boost (espresso shot!) helps too