What is correct Way of adding Negative Keywords ?
There are a number of similarities between how the match types react. As with your positive keywords, you can add negatives as broad, phrase and exact match. While matching behavior is largely similar with your negative types, there are a few key differences.
The biggest difference is that negative broad match won’t exclude queries that are synonyms or close variations of the negative keyword. It will only exclude queries that include all words within a keyword, irrespective of the order in which the words appear.
Read this link for examples and a better understanding:
Q. Does anyone have a good way to make sure that my exact, phrase, and broad match keywords (the same word different match type) are bid staggered? I want to make sure that my KW in multiple accounts are competing with themselves.
A. If you have multiple match types, make sure that you have exact match bid the highest, phrase match a little lower, modified broad even lower, and finally broad match at the lowest bid
For those that don't know SKAGS, here you go. http://unbounce.com/ppc/doing-adwords-wrong-make-it-right/