For one, I know that there is one true god, so I always keep that in mind, and I know which spells are fake (fluff spells for example: transforming into other animals/mythical creatures, shooting fire balls, flight spells, etc.) and which spells are real (see the "what magick is and isn't" article).
I mostly study magick rather than using it, because it can sometimes take a lot of energy away to cast a complicated spell.
I mostly study at night because my folks don't exactly like magick, so I keep it to myself, and my BOS is in a language that only I know.
Hope I helped a little!