The word surrender often times implies giving up, or perhaps giving in, and the negative connotations associated with quitting. But what I think we are really doing when we surrender is stopping the ego from resisting "what is."
When we surrender, we stop the struggle and the fight and we turn the issue over to our higher Self, our Source energy. This is the part of us that never changes and it is the part that connects us to the rest of the Universe and its intelligence.
It is at this point of surrendering or allowing things to be as they are, that other things begin to open up for us. By letting go of the struggle we are able to see things from a larger and different perspective, which is all we ever really need to get unstuck.