Where can I find lists of high probability of winning keywords

[Darden]

Keyword research can take a lot of time.   Suppose you are not sure of what keywords you want to rank for but just want to see a list of phrases that have 500-5000 searches a day, low cost and low competition because you are looking for phrases that interest you for which it will be easier to rank close to #1 in google.   Besides AdWords Keyword Tool, are there sites that specialize in this?

[RyanKent]

I agree with all the thoughts shared so far but would suggest SEMrush as my preferred tool for keyword research.

When conducting research, it is important to clarify if you desire to rank in organic search or plan to use PPC advertising. Many of the tools, including SEMrush and the adwords tool Alan shared, define "competition" in terms of ads, not organic search. High competition means there are several bidders for PPC ads who are bidding close to the same amount. This information is completely unrelated to organic search.

Even tools which evaluate competitiveness for organic search can be highly inaccurate. For example, many tools will look at the current top 5 or 10 results and strictly grade based on PR / PA. There could be less relevant results from sites like Wikipedia or other heavy hitters which rank strongly for the query therefore showing it as highly competitive. By targeting your keyword usage you may be able to beat other sites on some keywords. To clarify, I am not recommending you try to ever compete head to head with Wikipedia, but there are ways to beat them in some spots.

[MassivePrime]

Low hanging fruit is what you are looking for, what we do is first use the adwords keyword tool followed by the SEOmoz keyword difficulty tool. It's not perfect but it gives an indication of how easy it will be to rank for a particular keyword.

EGOL is right however in saying that if a keyword is easy to rank for then the reason is that your competitors have regarded that keyword as not being valuable, meaning you won't either.

[EGOL]

Suppose you are not sure of what keywords you want to rank for but just want to see a list of phrases that have 500-5000 searches a day, low cost and low competition because you are looking for phrases that interest you for which it will be easier to rank close to #1 in google.

I think that most of these "mouse holes" have been discovered and are now occupied. 

You might find one but I think that you will discover... is when competition is easy and the cost is low there is a really good reason for that.

[AlanMosley]

Have you tried google keyword tool
https://adwords.google.com/o/Targeting/Explorer?__c=1000000000&__u=1000000000&ideaRequestType=KEYWORD_IDEAS