Adwords Content Network Question

My question is about content network (not search).
Let’s assume I have a landing page for diet pills, I have already setup all the related content campaigns (with diet pill keywords).
I’d like to setup a campaign focusing women’s gym related websites.
What’s most important to get the most impressions from content network?
1) keywords
2) ad copy
3) landing page
Do I have to modify (or use another) landing page with women’s gym related keywords? Or can I use the same landing page, but use women’s gym related keywords and ad copy?
I’d appreciate any experienced users’ comments about the content network questions.
Thanks in advance
P.S. I was going to add this thread under google adwords, but I’ve made a mistake and added to PPC Advertising. I’d appreciate if mods can move this if it doesn’t fit here. Thanks.

See original post by onestop