I will be honest. There are going to be times in your life when all of the choices seem yucky to you. Even at those times, it is useful to remember that we have a choice. If you don't feel like going to work, don't tell yourself that you are going to work because you "have to". You don't have to! You could stay home. Even if staying home means no pay or possibly losing your job, you still have that choice to stay home or go. Most likely you will choose go, but it is still a choice. You are not powerless.
Let's also remember that there are usually more than two choices. It is important to think outside of the box to see all of the choices available to you. Perhaps you will go to work today but will put in your two weeks notice so that you soon won't be going to that job you hate. That is another choice. Perhaps you will go to work but will make a commitment to yourself to set aside an hour a night to work on a home business or to take a course or to look for a more fulfilling job. Those are also choices. Perhaps you will go to work but while at work will make an appointment with your boss to discuss doing some of your work from home or cutting back your hours or maybe switching to a four day, ten hour a day work week. Those also are choices. Another choice might be to call in and go to work an hour late or get out an hour early or take a personal day just for today. Those are excellent choices if you just think you need a breather.
The point is that everything that you do is a choice. You have a lot of power. Remembering this can really help you stay positive. Powerlessness makes people angry or depressed. Having the power to make choices and change things you don't like can't help but make you feel more positive as you go about your days.