don't you hate it when there is something....?

dont you hate it when there is something that you have seen or heard that oyu cant find again, and you spend a lot of time looking?
I hate when i hear a song somewhere or see a funny video clip that when i go home i cant find. i really liked this funny gym workout that i found on a site and i bookmarked this site but i must have deleted the bookmark by accident because i can not find it in my bookmarks. there is a couple songs that i heard somewhere one was at a party that now i cant find, and i typed in the lyrics of the chorus but all of the songs that google finds are not the right ones, and when you go further in the search it dosent even give you songs.