..in a nutshell......Google Adsense, Amazon, Ebay, Kontera...all these will make you earn via your hubpage articles. But for that you need traffic to visit your hubpages and to do that you need to socialize, spread word, network your articles on hubpages to all your friends.
Basically when traffic comes to your posted articles and click on google ads, you earn a share. If you have amazon links and a reader clicks and buys that item, you get a commission. This is how you will earn so
1) Write as many useful, informative hubs
2) Get google adsense account, Amazon Associates account and others setup
3) Publish your articles putting these ads
4) Invite traffic by spreading the word to friends, family, friend of friends and so on
If they click, u will start earning not a whole lot initially.
hope this helps!
2) Spread the word