Reddit mentions of Fasting

I quite enjoyed the book Fasting by Fr. Slavko Barbaric.

The best fast is supposedly on bread and water alone, but you can start off slow with fasting from certain foods on certain days (meat, junk food, alcohol, etc.). Fasting on Fridays was a previous Catholic tradition to commemorate his death, but the Church thought people were simply doing so out of habit and changed fasting to only 2 days a year. If you do choose to fast, Wednesday's are also good days to choose from as that was the day Judas sought out to betray him, the beginning of his passion.

Also, one cannot fast from their sins. We are all called to repent of them and leave them in the confessional. Fasting is of good things, not the bad. It is giving up something good out of love for Christ. Imagine you would say, "I shall give up my sin 2 days of the week, and sin the other 5..." you get the point.