Before you ask a saint to do anything and work with him, you should research his story to learn more about his personality and preferences.
Saints are often associated with certain areas of life, groups of people or professions and have a so-called "patronage".
Some of these patronages are justified by their life stories. Certain holidays are also dedicated to them, usually it is the date of death. On these days they are commemorated in a special way and their dearest offerings are offered to them.
The beauty of the saints is that they were all once human (except for the archangels, who are also often referred to as saints). Therefore, they also know human ups and downs and are not alien to life. They are happy to help and often very quickly. This is precisely why they are so popular in folk magic practice.