If you're looking to match clips you're probably correct in starting in color correction. I just try to match tones. I look at what I see as the most prominent color or feel and match it. If it's warm, I make my clip a little warmer, etc. Other then that it's kind of just a case of going by eye. If you want clips to be consistent, then really try and think; what does the first clip have that the second one doesn't?
As for trying to get a certain set mood or atmosphere, try doing some research. If you wanted a like film noir feel, for example. Then google it or read up on it. What makes film noir film noir? Then apply the color schemes and principles to the scenes.
edit: More specific problems would be helpful in me helping you btw
... and screenshots are good.