stock selection tools

Hi all

let's say I want to buy into a few spec stocks. The sub 5 cent miners etc.

How can I do an educated selection of these? Are there tools? Also what would you look for when selecting? I know that's a 'how longs a piece of string' question but maybe answerable.

I see Sabre (SBR) did nothing and then jumped 300% on an announcement. It'd be good to get in on the ground floor of a few others.

Thanks