With the google ads all you have to do is place your adsense ID in "my account" >>>> affiliate settings and click activate. Once this is done 60% of ad impressions automatically go to you.
If you have added your amazon id in the affiliate settings to display amazon ads you need to add amazon capsules to your hubs in edit mode. You can either choose specific products to display or use a keyword to show products. This is done from within the amazon capsule.
Here's more info on adding capsules: http://hubpages.com/guide/hubtool/capsules
Hope that helps :)