Nice, but what does it do?

It [prevenient grace] restores 1) a basic knowledge of God, 2) the moral law in the hearts of believers, 3) conscience, 4) a degree of free will, and 5) restraint against wickedness. Humanity is therefore made able once again to enter communion with God, but only as a response to God’s gracious invitation.— Reading the Way to Heaven, page 55

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Nice summary of what prevenient grace (the grace that "comes before") does. Salvation is the result of God's grace, but humanity has a part in it as a response to God's initiative. Our freedom is only possible because it is a restored freedom. But, and this is where Wesleyanism differs from Calvinism/Augustinianism, all humanity is given that grace. In other words, unlimited grace rather than apportioned grace.
</idle musing>