Yes, you can use your negative thinking.
To improve yourself, to push yourself.
When you are watching your favorite show, instead of getting up and meditating – use your negative thinking.
Think of the possibilities you would miss if you don’t meditate or don’t do whatever you want to do. Think of the stress you would be under tomorrow if you don’t calm yourself down. Think of the stupidity you make yourself out, if you simply don’t get up!
Scared yourself enough. Now go do your thing!