Blessings are extremely important. (Even if you just do it in your head, or use your own small ritualistic gesture.) One that I use often: "God, Goddess, Creator, Bless this food to our bodies and remove anything that isn't for our Highest Healing. Thank you God, Goddess, Creator. Thank you Universe.
Odin once told me, after I gave him my last cigarette in an alley near the Pearl Street Mall in Boulder, Colorado: "Always offer up your tobacco to the Gods."