Understanding Site Targeting (and placement negatives)

Applying them to a campaign

[Hubie]

Thanks to a friend:) who is really good with adwords, I've been woken up to the fact that a lot of my content ads were showing on sites I had no business being on. Obviously, those are all Negative Sites in my campaigns.

Here's where I get confused:

Let's say there's a content site with a lot of crap pages my ad is showing on, but some really good ones.

For example, lets say www.URL.com is the site

a really good page I WANT my ad to show on is: www.URL.com/widget_manufacturers
a crap page I DONT WANT my ad to show on is: www.URL.com/using_your_widget

What's the strategy here? Do I "Site Target" the good pages? do i make the bad pages "Negative Sites"?

Can I still let the URL.com site run my ads in case there are new pages I might want to site target (or make negative?).

Up till now, i'm just letting my ads show on URL.com for better or for worse...

[Hubie]

bump. Can anyone point me in the right direction here?