Got an example?
Well if you have an example website, I might be able to tell you.
I'd say alot of it is common sense. Don't get carried away with stuffing your pages with keywords. Rather focus on creating a quality article, that has images / video / screencasts to go along with it (if applicable).
People get way too carried away with stuffing keywords in my opinion. While it may work in driving traffic to the page from a search engine to begin with, if users are leaving as quick as they enter I'm sure the Big G is measuring it (bounce rate).
If you read your own page and it seems like its difficult to read because you have placed too many keywords in it, that's probably a good indication.