My favorite Reiki technique and the one I use most often in my practice is Byosen Reikan-ho. 

With Byosen, you actually scan the body for weak energy areas.  This may give you some intuitive insight as to what areas need energy balancing.

In Reiki, most practitioners lay the hands on position points of the body, however, with Byosen Reikan-ho most energy comes from the hands being placed above the position points of the body.  (A technique I had done before I ever knew Reiki existed).

Reiki energy can be beamed into the body from across the room.  This allows the Reiki energy to enter the physical body and treat the needed areas.  This is very powerful with distant Reiki treatments when a picture of the person or pet is provided.