"How to Make Yourself Have Sex When You Just Don't Want To"
"How to Make Yourself Eat Krispy Kremes When You Just Don't Want To"
"How to Make Yourself Love You Children When You Just Don't Want To"
Here's a dirty little secret: You should have an emotional attachment to your work similar to the emotional attachment you have to having sex, eating Krispy Kremes, loving your children, or whatever else is your thing. Others should have to drag you kicking and screaming away from your work.
If you "just don't want to work" then the wrong question to ask is:
"How can I make myself work when I just don't want to?"
The right question is:
"What the hell am I doing working on something that I just don't want to work on it the first place and what should I really be working on?"
Find the answer to the second question and you will never encounter the first question again.