Check out the results of the “‘English’ words Japanese don’t realise aren’t English” poll on What Japan Thinks for a list of useful wasei-eigo words. I actually think these lists are great for learning the correct way to use these terms in Japanese. There’s also a link to the original Japanese poll as well.

Note: some of the terms are intelligible in English (“coin laundry,” “book cover”) but perhaps are not the words people tend to use for that concept.