Self-discipline is the ability to stay motivated, take action, and push yourself forward, regardless of how you are feeling. It is the ability to manage your thoughts, emotions, or behavior to achieve a specific goal. Self-discipline is also known as self-control, willpower, restraint, persistence, and determination. 

Here are some tips to build self-discipline:

Set goals: Write out your goals and set a timeline to achieve them. 

Prioritize: Prioritize your goals and focus your thoughts, energies, and actions on accomplishing them. 

Be self-aware: Know your weaknesses and use your strengths to overcome them. 

Avoid distractions: Use willpower to avoid distractions and reward yourself when you resist temptations. 

Get help: Get a mentor, friend, or trusted guardian involved to motivate you. 

Plan: Use realistic targets, efficient deadlines, to-do lists, and well-planned schedules. 

Forgive yourself: Forgive yourself and move forward. 

Have a backup plan: Have a backup plan in case things don't go as planned. 

Self-discipline is an important skill that can help you achieve success. It can come naturally to some people, but others can achieve it with some effort.