I always start with my feet and work upwards. Well, I am a Pisces and the feet always comes first. Again, it is what is comfortable for you. Or, you might try an exercise where you tighten a particular muscle as tightly as you can and then let it go limp. Do this tensing and releasing all the way up your body and be sure to include the facial muscles.
Yoga is a big help in learning to relax the entire body.
With practice, this becomes very easy. You're relaxed and ready to begin focusing on the breathing which is the next step in the meditative process. For me, it is the breathing which is the key to spiritual connection and relaxation. Consciously slow your breathing just a little. With eyes closed, concentrate on your breathing.