It's weird. I haven't been going out of my way to look for employment other than summers of research where the great pay was a less important consideration than the lab experience, but people in authority keep offering great opportunities.
Last semester, I was co-TAing a University Physics I lab section (unpaid), and then my advisor asked me to consider tutoring a student in the class who needed some extra help. The student was a joy to work with, helped make me a better instructor for my class, and paid enough to cover my grocery bills for the semester. Funding from a state research grant I received enabled me to pay myself to do thesis research this semester. A fellowship that didn't even require an additional application means I'll get a signing bonus this summer.
I've just received an email offering me a job I didn't know existed and can't take. The math department offers one partial TA position to a student in the master's program in teaching, paying him or her $3,000 a semester in exchange for teaching a two-hour-a-week remedial evening class and spending four hours a week providing algebra help in the tutoring center. The professor who offered me the position knows (or at least knew) I'm going to do Teach for America, plus I'll only have a minor in math, so I'm quite surprised I was considered at all. I'm drafting a polite note letting her know that if I didn't have other plans I'd jump at this chance but I cannot accept the job.
Is it normal to feel a bit guilty about my good luck? People keep talking about how hard I've worked, but it doesn't feel like it. I haven't really sacrificed. I have certain aptitudes that prove useful, and I'm a hedonist whose preferred pleasures tend to be academic in nature. Yes, I put in time and effort; this is just what I do. Some of my activities have put me in contact with people who share my interests and are in a position to guide me toward interesting opportunities, but I haven't made an effort to network, it just happened. There are a lot of people around me who really strive for success, and it doesn't seems fair that I can just drift along and achieve the same results.