People like being able to solve their own problems. When they come to you with unsolved problems, it is an opportunity to help them become better at solving their problems themselves. Offer Socratic guidance instead of answers.
Direct an employee to either take a break. Give them the day off or encourage them to work from home. This is a great reward for someone who has been putting in extra time to meet a deadline or is otherwise working to support the team's goals.
When asking team members a question, they'll usually assume you are looking for a specific answer, which limits the insight and support you can offer your people. Broaden your conversations by asking a simple open-ended question: how's it going?