Did you know, that you can use abbreviations in the address bar?
Per default “g metallica” leads you to the result page of google when you search for “metallica”.
“e metallica” displays all items on ebay, that have “metallica” in the product description. The big befefit is, that you don’t have to visit the starting page of google or ebay first. With “z” this also works for amazon.
But the best thing about it is, that you can add customized searches. I added a search for geizhals.at, musicstore thomann.de and dict.leo.org to find cheap products, musical instruments or translation easily.