Magic is the Manipulation of the energies in the World around us to achieve specific goals. However there really are no hard and fast rules about magic. What works for one person may not work for you. You need to experiment for yourself, I can only give you a few pointers to get you started. The main thing I must mention is that you must believe fully in what you are doing. If you feel foolish sitting and reciting a spell, sit with you eyes closed for a while and breath deeply, and try and get over it. The psalms sometimes help here - they are good at letting the doubting conscious mind go, and preparing you for a spell.
One point I would like to make is that sometimes simply closing your eyes and asking the goddess is sufficient. for example if you are having trouble sleeping, you could try a spell with candles and incense etc, but before you do that, just try getting into bed, getting comfortable, closing your eyes, and asking the Goddess to send you to sleep. I think you'll be surprised at just how effective this can be.
Spells & charms are the part of Witchcraft most commonly used by the solitary Witch. Spells are done by full covens, certainly, but there are very effective ones that can be done by the individual. The most important ingredient in a spell is emotion. You must want something to happen. You must want it with all your being, and through that desire you will drive all your power into the Magick. This is the reason that it is far better to do Magick for yourself than to ask someone else to do it for you. If you are doing a spell for another person there is no way that you are going to put the same amount of emotional drive into it that they could. Spells and charms are not necessarily tied in with religious side of Witchcraft. To work a spell within the Circle, immediately following an Esbat rite would, almost certainly, be extraordinarily effective. Yet you can cast a simple Circle and work your spell at any other time and still get results
Start rituals off with a psalm. These relax you, and release thoughts of the day, and of work, so that your mind is free to deal with the task at hand.
I'm not going to go into a lot of detail about magick - it really is something you have to discover for yourself, as I found out. However I will give you some information about various energy sources, some of the tools Wiccans use, and my own personal favourite, colour and candle magick.
A few healing herbs, and what they are used for. It's a fairly small list, but then I'm not ahealer, so i don't have a full knowledge on the matter
A fairly comprehensive list of incense and its magickal properties
The Chakras - power centers of the body