Sometimes during our separation, I was so down and had little energy for anything such as working, reading, singing, reading the Bible, eating, or doing laundry.
One thing that often helped was to listen to worship that had alot of scripture in it. John G. Elliott and Twila Paris are two artists who, if I could find enough energy to put the CD in and push play, I would perk up some after awhile.
I am not sure if I had access to it at the time, but now I have the Bible on CD. Just listening to scripture being read can have a powerful effect. God's word is alive and active and sharper than any two-edged sword and it doesn't come back void - it will accomplish what is spoken.
It's important that if you can do nothing else - listen to worship music and/or Scripture.