Seek inner fulfillment
Pro Services Journal has an article on writing professional and personal missions. The article defines inner fulfillment as
Being active,Of those three, doing meaningful things is the most challenging. The article proposes that the first critical step to finding meaningful work is to "write a work mission -- that is, your purpose for working -- that has as much value for you as possible." This can start us on the path of enlightened self interest to create as large a purpose in life as possible.
Doing meaningful things,
Both with a sense of progress.