For those not able to receive the Eucharist, you can make a Spiritual Communion by praying the following:
My Jesus, I believe that you are present in the Most Holy Sacrament. I love you above all things, and I desire to receive you into my soul. Since I cannot at this moment receive you sacramentally, come at least spiritually into my heart. I embrace you as if you were already there and unite myself wholly to you. Never permit me to be separated from you. Amen.