We advise you to have a ring that does not have any holy name written on it, which you are free to wear in any place, and wear the mentioned ring with the holy names written on it when you are praying.
If the oath is taken by Allah that s/he will refrain from doing certain things like smoking then, kuffara must be paid should the action takes place. Kuffara is setting a slave free or feeding ten needy people 900 grams each of food like dates, flour and rice or providing them with clothes. If these acts can not be performed, one should fast for three consecutive days.
Our advice is to continue avoiding the things that he made the oath to avoid even after they were committed as it is better for him. Taking the oath is valid with or without the presence of a religious scholar.
The divorce is the right of the husband. In order to be fair, one should not choose to divorce his wife unless it is necessary. It is better to try to fix the relationship with the wife as much as possible, since a divorced woman is subjected to social and psychological harm more than a divorced man.