• Don’t expect fireworks on your first day. Glass, for example, talked about the importance of forcing yourself to develop skills when you’re new to a job. “That’s the hardest phase”, he said.
• Once you’re good - and only then - start looking for your niche. 

This advice is less sexy than the popular notion that with a little self-reflection you can identify your dream job right away. The reality of finding compelling work is ambiguous. 

These compelling careers unfold as follows: You choose something. You work hard at building skills. You fail at some things and respond by shifting your attention to other things that work better.

Over time, as you become more valuable to the world and confident in your ability, interesting opportunities finally start to arise. It is here, it seems, surprisingly late in the process, that passion reaches full bloom. 

From: Cal Newport in Complicated Career Advice from Compelling People