I am just A Beginner but I can offer You The Information Of Nearly non-stop studying for two weeks.
Blue is the color most associated with tranquility, but it's best to use colors that you feel are necessary.
Setting a spell into music or dancing while saying the spell helps many people reach a higher level of power because it allows more positive energy in and negative energy out. Unless of coarse you hate singing and dancing. It's different for everyone.
You Need To Concentrate. being unfocused is possibly the Worst thing for you to do.
Meditating before the ritual does wonders
GREEN TEA. I Don't know why but green tes Always makes me feel ready to concentrat.
Aviod Caffine before the ritual. It attracts both positive energy and negative energy that can ruin the whole of the ritual.
GROUND YOURSELF AFTERWARDS. It sends away excess energy.