Taping technique. Taping to prevent injury involves taping the affected finger to the next largest finger, if possible. The tape should be applied to the shaft of the bone, not over the knuckles (using 1/2 inch wide medical tape). Be careful to not tape the fingers together too tightly.
Buddy taping. If you have had a previous or recent dislocation to your finger, then you should be actively treated by a hand surgeon. However, the majority of time, you can treat with buddy taping the ring to the middle finger with 1/2 inch athletic tape to either side of the middle (pip) joint. Best to pad between the fingers as well.