Daily list of fresh pre-foreclosures, best approach?

[Valeriy S.]

I have subscribed to our local paper that publishes upcoming foreclosures. It is alot of information, what would be the best way of gleaning good potential deals? 

My approach now is to focus on the equity-heavy pre-foreclosures (by quickly comparing stated mortgage amount against tax value) and go door knocking. I'm not sure if this is a waste of time. I've had one guy seem annoyed like I was the 10th person to bother him with a "solution". 

Most other people so far have said they've taken care of the problem, or are not interested. 

I guess what I'm looking for is guidance in where my time will be best spent, as I can't literally can't keep up with all the newly fileds coming my way.