Afternoon thoughts

It's a slow Sunday afternoon. Vacations are almost over, and tomorrow working life will continue as usual. I'm not complaining, I just feel...Lost? I just finished watching The motorcycle diaries, and yeah, I'm one of those persons easily moved by good movies. I don't know, it just made me think, once again, the meaning of my life. Am I doing what I'm supposed to do? Is there a higher, deeper meaning in all of this? Am I just wasting air? Is there something else I could do to change the world around me?
Just ranting people... Just ranting...