Make sure your tracks are named correctly, which means writing the name of the instrument for each track along with other details, where appropriate. For example: Snare Top / Snare Bottom, Bass DI / Bass Amp, Lead Guitar, Rhythm Guitar L / Rhythm Guitar R, etc.
We assume that editing, pitch correction, and comping is already done on your tracks, so please let us know if you need this additional service.
Include dry tracks for each track that has already been processed.
Include DI tracks for bass and guitars, if available.
Make sure each track is consolidated back to the 0 point of the song. This means that you have to create a single file that starts at the very beginning of the session and runs until the track finishes.
Export the files in an uncompressed audio format such as .WAV and keep the same bit depth and sample rate as your session.
Make sure mono sources are exported as mono and stereo as stereo. Drums overheads / rooms, keyboards or stereo mic'd instruments should be the only tracks you export as stereo.
In the mix notes, don't forget to add the tempo (120 BPM), the time signature (4/4) and the key (A minor), if you know it. Be sure to mention any changes during the song, using the bar/beat as a reference (tempo map).
You should also add reference tracks and any other notes that you think would help us get the sound you want.