Color correction is all about trying to match all your shots at a neutral level. if you shot on two different days or used two different cameras or even different settings then you will have to color correct. It is far easier if you aim for a flat profile and focus on mainly exposures and temperatures, try and avoid changing the hue/saturation if you can.
For the grade it is all dependant on the mood of the video, i find it is always harder with skiing videos because there is always so much white in the image it is hard to push the grade because you will lose the whites.
My favourite examples of graded ski footage are any of Orage's latest edits and any of Under Armours edits, Bobby Brown's 'One Run' had awesome grading and the 'Border Patrol' is usually sick too.
Also washed out and desaturated footage can look dope if used properly and done well.