Re: Pausing keywords
I am assuming you are pausing the keywords due to low Quality Score or they just isn't performing up to par. You should always keep in mind that what you do today will effect your quality score in the future.
So in essence the quality scores of these keywords will effect your quality score in the future. It takes time to improve the QS in AdWords accounts, but it can be done.
For additional information on paused/deleted Quality Scores - http://www.ppchero.com/when-to-pause-or-delete-ads-keywords-to-save-your-quality-scores/
If your campaign QS is low you may want to look up sources to improve the campaign QS.
I hope this is helpful.
Stefan T. Martinez
-- Not an AdWords expert, just a student eager to learn more...