Remembering the souls in Purgatory

From today's First Reading (Wisdom 3:3-7)

They seemed, in the view of the foolish, to be dead; and their passing away was thought an affliction, and their going from us, utter destruction. But they are in peace. For if before men, indeed, they be punished, yet is their hope full of immortality; chastised a little, they shall be greatly blessed, because God tried them and found them worthy of Himself. As gold in the furnace, He proved them, and as sacrificial offerings He took them to Himself.

Try to cultivate the habit of offering up the pains you endure — minor and major — for those being "proved, as gold in the furnace."