I have said it before - the more you segment and track the more visibility you have into what is and is not working and can adjust appropriately.
Always separate adgroups into exact and broad match - phrase is for very high volume terms only - we bid on them as different keywords, and in some cases they even have different ad copy and landing pages based upon what works best.
Take a high volume generic term that can mean many things - Satellite is a decent example - it usually will mean TV, but it can also mean something in the sky, or far away parking or any number of other totally different things... Exact Match of Satellite are likely to convert better and thus can probably be bid higher, the broad match version of the same keyword will likely pull in non-related and thus lower converting searches and thus you should pay less per click in order to back into the same metrics. By breaking them into separate adgroups and tracking properly you know what to bid on each.
Same thing with Satellite TV - the exact version will probably convert better than the broad... Run a search query report on your past traffic and find keywords that make sense to exact match. So Buy Satellite TV and Order Satellite TV should be exact matched, Cancel Satellite TV or Satellite TV problems should probably be negative matched. Run this report once a month and in time your campaign and profitability will likely evolve for the better.
To those who say this is too much work, good luck as your space gets more competitive. You will get Killed once someone comes along with the extra few hours to build it properly to start and gradually optimize it. Sure it is easier not to, but it is almost certainly costing you lots of money.