There is such a wide variety of music types, that you might want to think about exactly what you'd like to find. You might be most interested in your favorite Christian soundtracks by a certain artist, or maybe you are interested in a certain type of music.
You can start by searching for favorite Christian soundtracks in Google, or other search engines that you are comfortable using, by simply searching for "favorite Christian soundtracks" if you are looking for universally popular and favorite soundtracks, or just "Christian soundtracks" to find a wider variety of music. Putting the quotation marks around the search term limits your search results to matches that have those words in exactly the same order. If you aren't getting the results you had hoped for, you can experiment with not using the quotation marks.
To find more matches for your favorite Christian soundtracks, you can try searching for a different phrase, such as "Gospel soundtracks", or fine-tune your search a little more. For example, if you were looking for download sites, you could enter "Christian soundtracks" AND downloads. If you wished to exclude a particular type of Christian soundtracks, you can also specify that in your search. For example "Christian soundtracks" -wedding would exclude music that is often used at weddings.
Once you find a site that features your favorite Christian soundtracks, check the site to see if it offers the types and formats of soundtracks you are looking for. If you are looking for cassette tapes instead of CDs, for example, see if the site provides them. If you need the soundtrack immediately, make sure the site provides instant downloads upon purchase.
Some sites have a lot of features, and make it really easy to find your free Christian soundtracks, allowing you to search by artist or type of music. Some sites provide a feature for you to be able to listen to the soundtrack before you buy. With some sites, you will have access to more features after you register for the site.