This feeling, that you are meant for something important but you don't know what it is, is the clearest signal you will ever get that you have yet to find your passion.<p>It gets harder to investigate your passions as you get older because you have more responsibilities to others, but the best thing to do when you don't know where your passion lies is to try as many different things as you can. Generally you can volunteer for things to get access to activities for which you want to go in with an attitude of if this isn't it then I'm going to do something different. You can volunteer through the various sciences, animal shelters, data gathering, politics, medical help, public service, television and radio, community service, environmental concerns, fishing, arts, etc. The nice thing about volunteering is that you can do your best and its always good enough because hey, its free for them right?<p>And while you're on this journey of self discovery you have to be <i>aware</i> which is to say you have to ask yourself at the end of the day, "How do I feel about the work I did today? Was it good? Was it great? Was it <i>meaningful</i>?" Listen to the inner you, shut out the voices of the world telling you what you <i>should</i> be doing, and find your center.<p>When you find it, build your life around it, make it your own. There won't be any more 'mediocre jobs' there will only be "This lets me work on this amazingly cool and important thing."