I have a few blogs that make a few bucks per month. One of them is starting to get some nice traffic and PR but I'm finding it difficult to keep posting enough content.

I'm hearing about how some blogs use feeds to update their content with content from other blogs. Can anyone explain to me how this is done and can it be done with blogger which is where this one particular blog is hosted (unfortunately).

I think then the issue of duplicate content arises.

Duplicate content.
You can try RSS Feed with excerpts.

I will still recommend that you get fresh content and blog it, regardless of whether it is blog etc.

Now a tip for you which has been providing me with endless fresh idea for blogging.

1. Go to here https://www.google.com/accounts/Login
2. See a "Alert" in the right hand side.
3. Set up a Google Alert with your site keywords. I recommend it to be comprehensive and once-a-day.
4. Let Google deliver fresh news and blogs to your mailbox for blogging everyday.

Or go straight here for step 1 and 2.
1. Google Alerts


Another tip
1. Go to Metacafe.
2. Post videos from there into your site.

Why metacafe? They have a "Recently viewed by" section that allows links from that post to your site. Get a direct pr 2~3 links in that manner. Checked that they do not have "no-follow" attribute. So you will get credits.

See how easy it is to get fresh contents?

I agree with the above. Post news/vids/press releases when you don't have fresh original content.

Also you can blog about what someone else blogged about in your own words and give them some link love. It will def. come back to you. Karma is great!