The final blessing is the official conclusion of the Mass, so — in that sense — once the final blessing is said, Mass is over and you may leave without technically missing any of the Mass.
Question Corner: Burning or burying sacramentals? And why use holy water?
If you have sacramental objects which you no longer need but which are still in relatively good shape, the best and easiest thing to do is pass them along to someone else who could use them.
Question Corner: On Limbo and on silent prayer
Limbo is not included in our Creeds and is never mentioned in our current Catechism of the Catholic Church.
Questions: Holy days of obligation, vegetarians in Lent
It can be a beautiful practice to go to Mass on a feast that isn’t strictly obligatory simply to enter more deeply into the spirituality of our liturgical year.
Why confess to a priest? What if it’s been a long time?
While we know for sure that sins are forgiven through the sacrament, God is of course free to extend his grace beyond even what he has promised.