You know you have a job to go to, things to do, or children to take care of but you just don't want to get out of bed. Responsibilities call for us to get up and get going. The things we've been appointed to do cannot wait; besides, we're the only one who can handle our lives. When it comes to the things that God has called to do for His Kingdom, He will sustain you and give you guidance. Though your task may not be an easy one, if we lay the burden of the assignment upon His shoulders, He will carry the weight. It takes a lot of prayer and listening to the Holy Spirit to get to the point where you become relaxed and free from anxiety while working for the Lord. My experience has been that if I feel burdened or anxious, I'm not doing it in God's power but my power. I'm not as effective as He is as completing the task at hand. Take His yoke upon you, learn from Him and He will give you rest.
Come to me, all who labor and are heavy laden, and I will give you rest. Take my yoke upon you, and learn from me, for I am gentle and lowly in heart, and you will find rest for your souls. For my yoke is easy, and my burden is light." Matthew 11:28-30