how to do witches spells and magic

Spells are kind of hard to include on a web page, since (in my tradition of Wicca) each spell is designed for one occasion; when we want a spell, we make a new one.

Spells can be very simple: burn a candle, and ask the Goddess for what you need - choose the color of the candle to go with the spell (your heart knows the right color better than I could tell you - use the color that feels right). Or leave an offering under a tree (leave a flower, or a coin, or pour out a little wine), and ask for what you need.

Things to Keep in Mind

Ask for what you need

If you don't need it, don't ask for it. The magical power of a spell is driven by a true need; if you're asking for a second yacht, you probably won't get any results that you would like.

Don't fence yourself in

The most likely reason for a spell to fail is if you're asking for something too specific - you want to give yourself and the universe as much room to maneuver as you can. Don't focus on details, focus on the feeling you want to have when things work out right. Close your eyes and try to find that feeling "out there"; if you find it, either move toward it or reach out and bring it toward you.

Pay attention to the tides

The second most likely reason for a spell to fail is if the time is just wrong. Remember that spells work within the bounds of nature, and sometimes the wind and the tides are working against you. When that happens, the best thing you can do is to put a finger to the wind and figure out where you can go, working with the natural flow of things; or just wait it out until the tides shift in your direction. If you read the Runes, this situation is usually indicated by the "ice" rune coming up.

Give something back

If you're asking for something, it's a good idea to offer something in return, at least as a token gesture - a flower, or a bit of food, or a coin, for instance (no live animals, please).
Remember that other people are using magic too, whether they know it or not
Most people have some natural magical ability, whether they know it or not, and an instinct for taking care of themselves. If you try to cast a spell that is inherently detrimental to another person, you will meet resistance from that person's magical energy. The magical universe is a crowded place, and things will work out best for you if you manage to navigate a path that avoids direct conflict with your fellow beings.

Follow up with mundane action

Another important point about spells is that it's very important to follow up with mundane action. If you cast a spell for money, don't expect a check to just show up in your mailbox the next day; get out and look for a job, or at least buy a lottery ticket (magic doesn't work terribly well with those, by the way, because everybody who buys a lottery ticket throws a bit of magic into it, whether they know what they're doing or not). The idea is to make a point of putting yourself into situations where the magic has a chance of working.
On Love Spells

Love spells are tricky; if you do a love spell aimed at a specific person, things will always turn out badly. I say this based on many, many first-hand stories I've heard over the years. What you want to do is concentrate on the feeling you're trying to capture, but don't think of the particular person you want to have that feeling with. Give the universe a little leeway to find what's right for you - if there's a chance of things working out in the long run, you might find that the person you have in mind will take an interest in you; but it's important to leave the door open for the possibility that your true love is someone you haven't even met yet. If you hang on to your fantasy too tightly, you might miss out on someone really special.

Spells and Wicca

I've found that the longer I practice Wicca, the less often I feel inclined to use spells. There are severeal reasons for this. For one thing, it's easier for me to take a longer view of things now; in a lot of the situations that I might have wanted to use a spell once, I can now see that things will work out acceptably without any magical interference, and what appears to be a crisis is just a natural part of the process. Another reason is that I'm much better at feeling when a spell just wouldn't stand a chance of working, so I save my breath until the tides are right. And perhaps most important, by working at it over the years both magically and in mundane ways, I've gotten my life much closer to the way I want it, so there are fewer reasons for me to want to shake things up.

I actually think spells are sort of peripheral to Wicca; it's something most of us know how to do, more or less, but it isn't central to the religion. After a few years, the steady, cumulative magic of the seasonal rituals turns out to be much more important than one-off spells.