Another common way to include charities in your estate plan is to care for your loved ones first and foremost and then donate whatever is left over – the residual of your estate – to charities.
I give and devise to New England Sci-Tech, Tax ID# 82-5114883, located in Natick, MA, all (or a percentage) of the rest, residual and remainder of my estate, both real and personal, to be used for its general support (or for the support of a specific fund or program).