What is the best way to make abstracts in Blender? Particles?
I havent been able to find much in the way of tutorials for abstracts, any links or tips would be great (or ever blend files 
) 
I am at a loss by what you mean by abstracts
I originally assumed you meant like abstracts meaning concept art, just the basic idea of where you were going.
Howerver, from the context suggested by your post you seem to mean abstract art, something not directly representative of something that exists in the real world. If that is the case particles are not the only way, there certainly are a number of simply oddly shaped things to be found done with blender (like the site graphics on blender.org…)