Self-control is the trait of choosing our actions according to our values, even when impulses push the other way. It supports health, relationships, work and peace of mind. Most people have it in some situations and not in others, which suggests it is less a fixed gift than a practice that depends on rest, environment and understanding. The Gita treats it as something that can be trained.
It begins with attention. Gita 2.62 describes how constant thinking about objects of desire creates attachment, then craving and finally anger, so notice what your mind keeps dwelling on and redirect it early. Gita 2.63 says anger clouds judgment, wipes out the lessons of experience and destroys the capacity to think clearly, so pause and cool down before acting in anger. Gita 3.37 calls desire, which becomes anger when thwarted, the chief enemy of wellbeing and wisdom.
The Gita also offers motivation and method. Gita 6.5 and 6.6 say a disciplined mind becomes an ally and an uncontrolled mind an enemy, so train it through regular discipline and wise choices. Gita 6.36 says yoga is hard without self-control but attainable through steady effort, and Gita 5.23 praises enduring the impulses of desire and anger. Gita 16.21 names desire, anger and greed as three gates to the ruin of the self, so identify which most often leads you astray. If a habit feels compulsive, please talk with a doctor or counsellor.