Shred meat in your mixer when the meat is still warm (but cool enough to handle).
Cut meat into pieces that will easily fit in the mixer bowl, and are roughly the same size.
Place the meat in the mixer bowl, but do not overfill. Work in batches if you need to.
Attach the regular mixer paddle and lower it into the bowl. Don't forget to lock your mixer arm in the down position.
Turn the mixer on low. Watch carefully as the meat shreds.
When you see some pieces of meat the size you want, stop the mixer and remove those pieces. Leave bigger pieces in the mixer and turn it back on.
If you leave the mixer running too long, the meat will turn to mush, instead of nicely shredded pieces.