I want to run google campaign for adwords and I want to target keywords that my competitor is ranking for.

How can I know what are the keywords that are helping my competitors the most.

Is there some way so that I can know what my competitor is bidding for those keywords.

I heard it also depends on the landing page quality.

Please suggest the best strategy to run adwords at lower cost and yet perform well.

I am willing to run campaign for this website .  It is basically meant to connect manufacturers representatives and independent sales reps to businesses.

Any suggestions are welcome.