Ask HN: How do you manage to be highly motivated 365 days a year without stop?

I would be interested to know what methods do you apply in order to keep being highly motivated over an entire year.

How can you motivate yourself to keep working very hard after you accomplish a milestone?

I am always trying to do more jobs once and to accept all the requests in order to be overhelmed with work so that I can keep being extremely high motivated. Aren't there better ways to achieve this?