One very useful tip Pastor gave during sermon is this: to replace worry with prayer. To worry is to constantly talk to yourself about what troubles you. So instead of talking to yourself, talk to God instead. The same faculty that frets can be trained to pray. What a good idea!
I tried doing it, and when I paid more attention to my thoughts, I noticed that I am nearly always worrying! It doesn't matter what I am thinking, or what conscious thoughts I have, somewhere at the back of my mind, looming like a dark shadow, are the things that worry me. They never quite go away, though they don't intrude into my activities or words.
Which means that if I were to follow Pastor's advice, I am going to be praying day and night! Well...it beats constant worry, so never mind, I shall just do it anyway.