1. don't stay focused on a negative event
don't wallow in the disappointment/bad news
The verb 'to wallow' is to luxuriate or to indulge in a pleasurable activity. Wallow can also refer to what large mammals do when they lie in mud for a long time to keep cool. If someone tells you not to 'wallow' it means they are suggesting you move on or don't stay stuck in the condition you are in. You can say 'don't wallow in despair' or 'don't wallow in self-pity'. These are phrases you are more likely to hear in social conversations or among friends.