Spells and potions tend to go together in people's mind when they think of witchcraft, even though "potions" are more of a Hollywood invention.
Nonetheless, they can be a realistic aspect of your spellcraft and there are real spells that use potions out there. The term "potion" is just a little dramatic. It's just an herbal or otherwise magickal drink that is used during a spell.
I already have a page specifically for love potion spells, but this page is dedicated to a few other potion purposes.
Unleash Your Power Potion
This is a good general-purpose spell and potion that lets you really bring out your best when you need it. Think job interview, important exam, or even launching a business. Try this spell when you need that inner energy boost.
Draw a large pentacle on the paper, and set your glass in the center. While it sits in place, add a little allspice and ginger to the water, along with 3 drops of vanilla extract. Slice the lemon in half and repeat:
By this potion, I do ask,
Give me power for my task.
Herbs and fruit and color red,
Down this path, the spell is led.
Squeeze the lemon juice into your glass. Wrap the red yarn around the glass a few times, and tie in a knot. Let the glass sit for a few minutes while you concentrate on the reason you're doing this spell. Give your potion this energy, and then pick up the glass in your right hand and take a drink. You don't have to finish it all, just one good sip is fine.
Let it sit until the event your preparing for has passed. Then pour the remaining potion out into the Earth (not down the drain!)
Draft of the Third Eye
This is a spell and potion to help open up that third eye to bring more psychic experiences into your life. This is a magickal recipe, not a pharmaceutical one so don't expect any weird hallucination or anything drug-related from this brew.
Set a small pot of water heating up on the stove. Add about a teaspoon of dried mugwort and a pinch of rosemary. Let it come to a simmer then drop in the moonstones, one at a time. Stir the mix clockwise 3 times. Touch the surface of the water with the tip of the feather then touch it to your forehead. Let it simmer for another few minutes then let it cool.
Pour your potion into a cup and have a few drinks (please don't choke on the moonstone pieces, but do leave them in the cup). Your third eye will start to open and you'll be ready for inspiration and psychic experience.
please note that mugwort will have a physical effect on your body (all herbs do, really) and this potion should not be used by anyone pregnant. Seriously.