Always have a desire for purity {a prerequisite for Heaven)

Examples of avoiding sin:

If you fall off your horse, quickly back on.

If a hot amber lands on you, quickly brush it off.

If purity has a level line, don't allow yourself to fall below it. 

Avoid temptation and guard your purity - Have clean thoughts.

Talk to Jesus, to Mary, to the saints and the angels often.

Ejaculatory Prayers:

Short prayers can be used throughout the day to help with purity.

“Lord Jesus Christ, Son of God, have mercy on me, a sinner.”

“Create in me a clean heart, O God, and renew a right spirit within me.”

“Lead me not into temptation, but deliver me from evil.”

"Lord, help me to be holy."

Trust in God:

"In tribulations, turn to God with confidence. You will obtain strength, light and knowledge. In joys and successes, turn to God with fear and sincerity. You will escape all snares and be free of everything false." - St John of the Cross

God bestows more consideration on the purity of the intention with which our actions are performed than on the actions themselves.” - Saint Augustine

"Do not let the past disturb you - Just leave everything in the Sacred Heart and begin again with joy." - St Teresa of Calcutta

The Habit of Good Thinking