No real answer, as everyone is different. But here's my tip, which is slightly wacky.
Close your eyes and imagine you are in a room where all the anxt about your worries is contained. then imagine yourself stepping from the room, and just outside it you can still just hear the worrying thinking going on inside the room you left. Close the door to your worry room, and say to yourself you'll deal with them anothertime.
Its abuot using another part of your mind, that's all. Everything in the mind is a choice - choose to think something different, by mentally closing a door on the worries - afterall, worrying doesn't solve problems.
If you return to your worries, then the worrying thoughts have too much invested "feeling" - think some happier thoughts and don't be afraid to move on.