Force yourself to become engrossed in activities? Walking, running, cooking, meditating, praying, cleaning, binge watching a comedy series or movies? Laying in bed ruminating contributes to the problem. I know some people have the type of depression that makes it hard for them to get out of bed every day but make your battle be about accomplishing small goals rather than changing your thoughts. If you do something enough, you will start thinking about it.....<<hugs>>