Lammas celebrates the first harvest of the year, which is the grain harvest. Lammas means 'loafmass' in old English. The Celts referred to this festival as Lughnassadh, named after the Irish God Lugh, His Welsh equivalent being Llew. Llew Llaw Gyffes was the son of the Goddess Arianrhod and Her brother Gwydion. Llew was a God of light, ability and skill. He grew rapidly to manhood and had a head of shining golden hair, these factors are thought to represent grain. Lughnassadh is a celebration of His death and rebirth (the grain being harvested and made into bread), a sacrifice given willingly to The Goddess (the land), so that all may benefit. The Goddess is seen as the bountiful Mother and as the one who brings death, and through Her, rebirth.
Have on your altar seasonal foliage (ripened grain if you can get it), and offerings of fresh bread and wine. Light the candles and incense and cast the circle in your usual way. Call upon The Goddess as the bountiful Mother, and The God as The Corn King.
Sit quietly and think about the meaning of Lughnassadh.
Reflect upon what you have achieved and how these achievements have subtly changed you.
Think about what you can give to others, be it money to a charity, your personal time to someone who would appreciate it etc.
Face the altar and make a pledge to The Goddess and God, stating your intent.
Offer up first the wine and then the bread, thanking The Goddess and God for your own 'personal harvest'. Eat and drink a little and then give the rest back to the earth.
Close the rite in the usual way.