How would you deal with error correction in your classroom?

There are many options in which you can correct your students: immediately, after a few minutes, at the end of the activity, later in the lesson, at the end of the lesson, in the next lesson, later in the course, never. And for me, the best option is immediately. When I teach I ask to my pupils about the topic because I like to hear their opinions. The reason is because in that way I can take notes about their mistakes. I know I am not perfect yet, but if I don’t the correct pronunciation of a word I search on my dictionary and it helps me to correct my students. I correct them immediately because in that form the rest of the students learn through of their classmates’ errors. When they are doing a group activity I walk around of them and I correct their mistakes but with gentleness because if I laugh or if I do a gesture they feel uncomfortable. Then they don’t want to participate in classes because they feel shame of their mistakes and maybe they can lose the interest to learn English.