As much as you can motivate yourself ,no one else can , you know your condition better than other .
Others will always judge and analyse you on the basis of appearance and assumption that they will assue from you , but you can only motivate yourself on factuility .
so stand up......
Be energetic and confident about yourself , Be the first to motivate yourself .
Be the first to understand yourself and push hard to know about your efforts which will lead you to success.
Whenever you feel down , and at that time do the type of things which makes you happy not the things which makes others happy , because its your life and your own choice .
 Fresh up your mind ,
Take time .....
Then when your brain starts working again , develop the technique which you should apply on yourself that will trigger your stimuli to respond you and motivate you.