Map out the mix. Allot two mixing channels to each song snippet to retain the stereo effect of its mix.
Assemble or locate all the bits and pieces of the song segments you plan to compile into one final song or music track or file.
Position each first channel far left and the second channel far right for each song segment included in the final mix.
Set the volumes of all song segments according to levels that are pleasing to you.
Add audio effects to as many channels as you want. This mainly consists of cross-fades, lowering the volume of one song segment as you raise the volume of another, as one song segment segues into the other.
Make a final stereo mix once the bits and pieces on songs are balanced and blended as you want them. Burn or save a final 2-channel stereo version to CD or save the final mix to a hard drive. Save the music in one of the popular digital formats you prefer.