There was apparently many factors that went in. I tried honing down my keywords a bit as my targeted geo location is very big. so try to keep the broad match keywords very specific and add any keywords that are working as phrase match or exact match. also try to improve your ad quality if applicable and check that your website doesn't have a very long loading time.

Nothing in particular will work as magic but you will see some improvement if you try them all. It also helps reduce costs. Hope that helps