Almond - While not every amaretto is made with almond, I always associate it with this particular nut, so that's good enough for me. Almonds are associated with vitality, luck and universal love. They're also known as an energy booster.
Apples - Since apples are harvested in the autumn, they'll bring those vibes all on their own. Apples are associated with abundance, love, and longevity, amongst other things.
Cinnamon - If you do decide to add that cinnamon stick, call on it as a blessing for you and whoever you're sharing your drink with. Cinnamon is associated with spirituality, so allow it to deepen your gratitude for your spiritual connections.
Oranges - Sunny oranges are associated with success, prosperity, and friendship. The smell of an orange just always makes me happy. That should be a strong clue to its power.