1. In every prayer you say, every Mass you hear, every Communion you receive, every good work you perform have the express intention of imploring God to grant you a holy and happy death and no Purgatory. Surely God will hear a prayer said with such confidence and perseverance.
2. Always wish to do God's will. It is in every sense the best for you. When you do or seek anything that is not God's will, you are sure to suffer. Say, therefore, fervently each time you recite the Our Father: Thy will be done.
3. Accept all the sufferings, sorrows, pains and disappointments of life, be they great or small, ill health, loss of goods, the death of your dear ones, heat or cold, rain or sunshine as coming from God. Bear them calmly and patiently for love of Him and in penance for your sins. Of course, one may use all his efforts to ward off trouble and pain, but when one cannot avoid it let him bear it patiently. Impatience and revolt make sufferings vastly greater and more difficult to bear.
4. The greatest act in Christ's life was His Passion. As He had a Passion so each one of us has a Passion. Our Passion consists in the sufferings and labors of every day. Therefore, let us do our work, accept its disappointments and hardships and bear our pains in union with the Passion of Christ. We gain more merit by a little pain than by years of pleasure.
5. Forgive all injuries and offences for in proportion, as we forgive others, God forgives us. Go to confession. This sacrament does more than "just" rid us of our sins; it gives us a tremendous increase in sanctifying grace. It wins for us a higher place in Heaven, with increased union with God. Each time we go to confession, we are preserved from many dangers and misfortunes which might otherwise have befallen us. A devout confession helps us to hear the inspirations of the Holy Spirit, and to hear and follow the advice of our guardian angels.
6. Avoid mortal sins, deliberate venial sins and break off bad habits. Then it will be relatively easy to satisfy God's justice for sins of frailty. Above all avoid sins against charity and chastity in thought, word and deed for these sins are the reason why many souls are detained in Purgatory for a long time.
7. If afraid of doing too much work, do many little things, acts of kindness and charity, give the alms you can, don't grumble or complain when things are not as you please, don't complain of others, never refuse to do a favor for others when possible. These and such acts are a splendid penance.
8. Do all in your power for the Holy Souls in Purgatory. Pray for them constantly, get others to do so, join the Friends of the Poor Souls and ask all those you know to do likewise. The Holy Souls will repay you most generously.
9. There is no more powerful way of obtaining from God a most holy and happy death than by weekly confession, daily Mass and daily communion. Masses may be arranged after or before someone's death to expedite their time in Purgatory.
10. A daily visit to the Blessed Sacrament – if only for three or four minutes – is an easy way of obtaining the same grace. Kneel in the presence of Jesus with eyes fixed on the Tabernacle or Monstrance, sure that He is looking at you, then repeat little prayers like these: My Jesus, Mercy. My Jesus, have pity on me a sinner. My Jesus, I love you. My Jesus, give me a happy death.
11. Wear the Brown Scapular of Our Lady of Mount Carmel. "Whosoever dies clothed in this scapular shall not suffer eternal fire." This is the Blessed Virgin Mary's Promise, made July 16, 1251 to St. Simon Stock. The Sabbatine Privilege is Mary's promise to release from Purgatory soon after death, all those who: 1) wear the brown scapular 2) observe chastity according to their state in life and 3) say the Little Office of the Blessed Virgin Mary every day. To be eligible for this scapular promise, one must be enrolled.
12. Use holy water to remit venial sin. Because of the blessing attached to it, Holy Mother Church strongly encourages its use upon her children, especially when danger threatens, such as fire, storms, sickness and other calamities. Every Catholic home should have a supply of holy water. Sprinkle some holy water on the ground, then make the Sign of the Cross and pray: "By this holy water and by Thy Precious Blood, wash away all my sins and the sins of the Poor Souls in Purgatory, O Lord".
About Brown Scapular (from Appendix in Fr O'Sullivan book):
(The following official information was obtained from the National Scapular center, Darien, Illinois, May 9, 1986.)
Two wonderful promises of Our Lady of Mount Carmel are available to those who have been enrolled in the Brown Scapular.
The great promise of the Blessed Virgin Mary, given to St. Simon Stock on July 16, 1251, is as follows: "Whoever dies wearing this scapular shall not suffer eternal fire."
Our Lady's second Scapular Promise, known as the Sabbatine Privilege (the word "Sabbatine" meaning "Saturday"), was given by the Blessed Virgin Mary to Pope John XXII in the year 1322 and is as follows: "I, the Mother of Grace, shall descend on the Saturday after their death, and whomsoever I shall find in Purgatory, I shall free."
There are three conditions for obtaining this privilege: 1) the wearing of the Brown Scapular; 2) the practice of chastity according to one's state of life; 3) the daily recitation of the Little Office of the Blessed Virgin Mary.
Those who cannot read can abstain from meat on Wednesdays and Saturdays instead of reciting the Little Office. Also, any priest who has diocesan faculties (this includes most priests) has the additional faculty to commute (change) the third requirement into another pious work for example, the daily Rosary.
Because of the greatness of the Sabbatine privilege, the Carmelite Order suggests that the third requirement not be commuted into anything less than the daily recitation of seven Our Fathers, seven Hail Marys, and seven Glory Be to the Fathers.