TRavel tips in greece (Athens)

Summer is here in the question is: WHERE DO I GO!?!??!

any low cost flights from Athens? cheap deals, last minutes? links? low cost traveling?

islands Hop On and Off? any suggestions?

suggestions for this summer? to go around gREECE, near by athens or even fly away from Greece? open tu suggestions, but key words: not so expensive and not so far...