Hi, for me your site performance is pretty good. Are you sure that you have selected Stockohlm server, when testing via pingdom tools?
You are loosing 600ms thanks to your hosting company.
You have also too many http requests.
minify javascript and css (autoptimize plugin for example)
also check Optimising WordPress for Page Speed in 15 Minutes
try different speed testing sites gtmetrix or webpagetest
