Ignatius of Loyola (c.  23 October 1491 – 31 July 1556), venerated as Saint Ignatius of Loyola, was a Spanish Basque Catholic priest and theologian, who co-founded the religious order called the Society of Jesus (Jesuits) and became its first Superior General at Paris in 1541.  The Jesuit order served the Pope as missionaries, and they were bound by a fourth vow of special obedience to the sovereign pontiff in regard to the missions.  They therefore emerged as an important force during the time of the Counter-Reformation.

Ignatius is remembered as a talented spiritual director. He recorded his method in a celebrated treatise called the Spiritual Exercises, a simple set of meditations, prayers, and other mental exercises, first published in 1548.

Ignatius was beatified in 1609, and then canonized, receiving the title of Saint on 12 March 1622. His feast day is celebrated on 31 July. He is the patron saint of the Basque provinces of Gipuzkoa and Biscay as well as the Society of Jesus, and was declared patron saint of all spiritual retreats by Pope Pius XI in 1922. Ignatius is also a foremost patron saint of soldiers.
Source: https://en.wikipedia.org/wiki/Ignatius_of_Loyola

Although originially writen for the consumption of retreat directors and spiritual advisors, The Spiritual Exercises of St. Ignatius Loyola have become an indispensible tool to assist individuals in discerning God's will in their life.  

"The Spiritual Exercises are a compilation of meditations, prayers, and contemplative practices developed by St. Ignatius Loyola to help people deepen their relationship with God. For centuries the Exercises were most commonly given as a “long retreat” of about 30 days in solitude and silence. In recent years, there has been a renewed emphasis on the Spiritual Exercises as a program for laypeople.  The most common way of going through the Exercises now is a “retreat in daily life,” which involves a monthslong program of daily prayer and meetings with a spiritual director.  The Exercises have also been adapted in many other ways to meet the needs of modern people."  
Source: "The Spiritual Exercises". Ignatian Spirituality. Retrieved 2020-11-21

It's not feasible for the vast majority of us to make a 30-day retreat, that goes without saying!  But there are applications of the Spiritual Exercises that can be incorporated into our every day routine.  IgnationSpirituality.com is a great resource geared for our daily effort to know God's will in our life:
 

"The Daily Examen is a technique of prayerful reflection on the events of the day in order to detect God’s presence and discern his direction for us. The Examen is an ancient practice in the Church that can help us see God’s hand at work in our whole experience."

1. Become aware of God’s presence.
2. Review the day with gratitude. 
3. Pay attention to your emotions.
4. Choose one feature of the day and pray from it.
5. Look toward tomorrow.