How To Stay Motivated.

Set a goal.
Make it achievable but challenging. Then dedicate yourself to reaching it. If your goal is not challenging or not realistic, then you will feel unmotivated.
One step closer everyday.
Make small progress towards your goal. Each week, tell yourself that you are closer to reaching your targets.
Persevere.
Tell yourself that sometimes circumstances might throw you off your course to reaching your goals, but if you persevere then taste of success is much sweeter. Every setback you overcome can only bring you closer to success.
Do something different or differently.
Following the same routine everyday could take away the enthusiasm. Try to do something different, or do the same thing differently. This will help bring some excitement back into your life.
Find a partner, or mentor.
Their encouragement and guidance will help to boost your willpower. You just cannot afford to give up when someone is relying on you.
Get feedback.
If you are progressing then ask “why”. If you are not progressing then the more reason for you to ask “why” Sometimes comments from the people around you could spark some new ideas and enlighten you.
Keep track of your progress.
Learn from your mistakes. Even when you win, ask yourself if there are areas which you can improve on. Over time, you will have only good habits. Achieving your goals will be so much smoother and automatic.
Celebrate small achievements.
Give yourself a treat when you achieve your short term goals.
Breakthrough.
Complete something that you have been delaying doing. Then you will feel positive because you have accomplished something and life is progressing ahead. Examples are mowing the lawn, repairing some equipment, baking a cake and so on.