I recently took a training on trauma and children - at the end of the training, it had a few slides on burnout & compassion fatigue. After feeling this way A LOT in the past and eventually experiencing burn-out, I'm the first to say, self-care is so important! Having my cup overflow from God's grace, my relationship with Him & other encouraging believers, such as my wonderfully supportive husband and mom, is what gets me through each and every day. I'm able to help others because my heart & spirit are full. And organization and not procrastinating are key!
http://www.socialworker.com/feature-articles/field-placement/What_I_Wish_I_Had_Known%3A_Burnout_and_Self-Care_in_Our_Social_Work_Profession/
I hope in whatever your job is that you find your cup to be overflowing with His grace.