You can use tarot cards as magic charms, focusing on them to bring about a certain desired outcome in your life. Minor arcana cards are particularly useful as they have more specific meanings than the major arcana which tend to deal with more general themes. Here are some uses for the minor arcana cards. You can use them separately as charms or combine them to create more complex spells.
Ace of Wands: Focus on this card when you need inspiration to get started on something.
Two of Wands: Focus on this card when it is time for your ideas to materialize into physical reality.
Three of Wands: Focus on this card when you want to present yourself or your project to the rest of the world.
Four of Wands: Focus on this card when you want to form an alliance or joint venture.
Five of Wands: Focus on this card to work effectively with others.
Six of Wands: Focus on this card for public speaking or leadership principles.
Seven of Wands: Focus on this card to stand your ground or hold others at bay.
Eight of Wands: Focus on this card for quick efficient communications.
Nine of Wands: Focus on this card when you want to defend your position or protect your assets.
Ten of Wands: Focus on this card when you are dealing with burdens that are exhausting your energy.
Ace of Cups: Focus on this card when you are ready to begin a new relationship.
Two of Cups: Focus on this card for issues with intimate relationships.
Three of Cups: Focus on this card for issues with friendships.
Four of Cups: Focus on this card when you want to take advantage of opportunities you might otherwise miss.
Five of Cups: Focus on this card when you want to recover from loss or disappointment.
Six of Cups: Focus on this card when you want to reunite with someone you care about.
Seven of Cups: Focus on this card when you are trying to make a touch choice and need to weight all the options first.
Eight of Cups: Focus on this card when you want to locate lost objects or embark on a spiritual retreat.
Nine of Cups: Focus on this card when you want to celebrate or entertain others.
Ten of Cups: Focus on this card for family matters.
Ace of Swords: Focus on this card for mental clarity.
Two of Swords: Focus on this card when you need to make a difficult choice with two options.
Three of Swords: Focus on this card when you want to prevent or heal heartache.
Four of Swords: Focus on this card when you are trying to recover from exaustion or illness.
Five of Swords: Focus on this card when you want to encourage good sportsmanship or recover from a humiliating loss.
Six of Swords: Focus on this card to ensure safe travel.
Seven of Swords: Focus on this card when you want to prevent theft or deceoption.
Eight of Swords: Focus on this card when you need to escape a mental or physical prison, or to liberate yourself from past mistakes.
Nine of Swords: Focus on this card when you want to eliminate nightmares, insomnia, or panic attacks.
Ten of Swords: Focus on this card when you want to prevent or recover from gossip or backstabbing.
Ace of Pentacles: Focus on this card when you want to start a new job, make a sound investment, or improve your physical health.
Two of Pentacles: Focus on this card when you want to balance your budget or your time.
Three of Pentacles: Focus on this card when you want to find guidance, training, or advice on a creative project.
Four of Pentacles: Focus on this card when you want to protect your assets.
Five of Pentacles: Focus on this card when you want a change in the weather or need to find shelter.
Six of Pentacles: Focus on this card when you want you are in need of money or are owed payment.
Seven of Pentacles: Focus on this card when you are lacking patience or are eagerly awaiting a reward.
Eight of Pentacles: Focus on this card when you want to make money doing what you love.
Nine of Pentacles: Focus on this card when you need solitude or want to commune with nature.
Ten of Pentacles: Focus on this card for improving your family life.
You can add court cards (Kings, Queens, Knights, and Pages) to represent specific people that are related to the issue at hand. For instance if you want to improve an intimate relationship you can combine the Two of Cups with two court cards. If this is a new relationship you can also include the Ace of Cups. For spells, you should lay the cards out in a pattern that makes sense (the two people should be facing each other in most instances) and speak some poetic words for what you are trying to accomplish. A spell is well worded wish, and the cards give you a focus for your energies and should also help inspire you with the phrasing.
Images from Rider-Waite Tarot © U.S. Games Systems, Inc.