This is one of the topics that took me 4 years to master. Color Correction & Grading is one of the most crucial elements of any post production. It can either kill the efforts of endless hours the DP and crew spent or dramatically boost final output pictures.
The best part is when Vashi lists the proper order of operations to maintain best picture quality. I strongly recommend you take the time to thoroughly go through the article and digest the helpful tips Vashi laid out.
To read the full article, go to 7 Tips for HD Color Correction and DSLR Color Correction