Imma lay all my E-diggin' secrets on the table, so listen up, Im never saying this again lol:
Listen to your favorite songs from your favorite artists then find out who they sampled. Google the person the sample is from and either go to discogs or wiki, when you get there, find out what album the sample is on and what year it was released. Now google type into google the album title, the year the album was released, and the words 'blogspot', 'mediafire', '**********' or 'uploading' behind the title. After you find a working link and a site hosting either a zip or rar file version of the album, dig through the album and find out if there's other samples on the album that you can use. If you cain't find anything, go through the rest of the artist's discog and download the rest of their albums until you find something.
Ps. It also helps to find out who produced a sampled artist's work cus they prolly have a signature sound that your feelin', for example, I like to sample Grover Washington Jr., David Mathews and Eumir Deodato so it only makes sense that I search for songs that Creed Taylor produced when lookin for samples as he produced all of my favorite artists to sample. ALSO, youtube can help you find samples. If you hear a sample you like, check the sidebar for other songs with interesting album art and titles, they might B good samples!
Hope this helped, enjoy and best of luck gettin' your carpal tunnel on!