We all have our methods for spell casting and it varies between person, which is known. I would like to share some of my methods for casting and encourage all whom want to share to put their thoughts down.
To begin I cast my circle. While circle casting is not always necessary in doing spell work, for longer spells that I do, I circle cast. When I do, I usually say a little rite for protection as I am performing the spell. I invoke the elements, and again, some do not work with the elements and will invoke who or what they wish to invoke or do not invoke at all. When I am done with this I thank the elements for their help and open the circle once more.
Sometimes when I am on the go and need... for example, a protection spell if I am feeling a bit unsafe, I mutter the spell to myself, and say the spell in my mind. This could be a good tip for anyone who is afraid of anyone to hear them as they say a spell.