hahahahha.
everyone might think this is a really lame idea but it definately worked out for me...
recently i was browsing through my yugioh cards and decided, hey i could make a servitor through these cards..

so i turned it to the back and put on the middle my sigil for the phrase FOCUSED INTENT
then i drew other random sigils stating the purpose of the servitor....
i gave it energy, and for each purpose i want the servitor to perform i just think of the sigil on the back of the card while giving some energy to my servitor...
it actually worked and maybe others who play the card game could try this and tell me their results...