a bit long but i found this
Skin and Toe Nails
Superstitions associated with skin and toe nails include avoiding cutting them on Holy Innocents Day. The moon is considered by many as an important influence in nail and hair growth. Nails should be cut when the moon is on the increase, if you want to make them grow strong. Corns on the other hand can only be cut successfully if done after the moon is on the wane. Picaso kept his hair and nail clippings dated and in a safe place in fear they should fall into the hands of a witch or warlock. Hair, skin and nails make powerful potions which can be used against the owner. A popular habit was to burn toe nail pairings for luck. A common belief was if you throw toe nail cuttings onto the floor or ground you would be forced to pick them up when you die.
The following rhyme was recited to help people choose the right day to have their toe nails cut.
Cut your nails in Monday, cut them for news; (of success)
Cut them on Tuesday for a new pair of shoes;
Cut them on Wednesday, cut them for health;
Cut them for Thursday, cut them for wealth;
Cut them on Friday, a sweatheart to know; (also a good way to avoid neuralgia)
Cut them on Saturday, a journey to go;
Cut them on Sunday, you cut them for evil,
For all the next week you'lle be ruled by the Devil.