Do what you know needs doing no matter how you feel. Sometimes life is one step at at time. Do what is before you. Then, do the next thing that is before you. What is God's will? What needs doing today? Not what other people want you to do, but what do you know you very much need to do or you will be bugged inside your head for slacking off.
Do what needs doing.
Thank God and praise Him for the little things, for everything, especially on days you want to quit. There is power in praise. Praising God will put your eyes on Him. Praising God will give you hope. Praising God will open your mind to His creativity. Praising God will give you the perspective you need.