Do you want to republish content legally ?. First look for license type before republish content. With certain conditions some websites allows you to republish copyrighted content in your website or blog.
For example Gawker media blogs like Gawker, Defamer, Deadspin, Lifehacker, Gizmodo, io9, Kotaku, Jalopnik, Jezebel, etc allows one to re-publish their content under a Creative Commons License. also, Images from a site must not be used in print without you obtaining the appropriate copyright clearances yourself.