Grace is a gift of the Holy Spirit; it sanctifies and justifies the recipient. It cannot be earned, borrowed, begged for or bought. It is God’s to give and God’s to take.
Grace moves us in the ways that serve God. Being in God’s grace is being in the company of God and while we cannot do things or act a special way to get into God’s grace, we can certainly be reminded how, with a humble heart, St. Joan of Arc said to her accusers who asked her if she was in God’s grace: “If I am not, may it please God to put me in it; if I am, may it please God to keep me there.”
Sacramental Graces are those associated specifically with the Sacraments. They are special graces to continue to strive for holiness and are received through the Sacraments (Eucharist, Reconciliation etc.)