Have a good mind to do something
Definition 1 of 1
Pro Tip 1/3Emotional Intent
Indicates a strong inclination out of frustration or annoyance but not a final decision. 
After waiting for an hour, I had a good mind to cancel the meeting.
Pro Tip 2/3Not Actual Plans
Expresses a thought one is unlikely to act on, showing hesitation rather than intent. 
I had a good mind to throw out his old clothes, but I knew he'd be upset.
Pro Tip 3/3Colloquial Use
Common in spoken English and informal texts; typically not used in formal writing. 
She messed up the order again, and I had a good mind to complain to her manager.