I am not a Buddhist monk but I know a little bit about meditation and I have a couple random tips that have helped me day to day. I know you didn’t ask but here they are anyways.
From a technical standpoint meditation is about controlling your thoughts rather than letting them control you. IE, you get mad, you hit someone. Meditation gives you the ability to see the anger and let it pass through you. That is over simplifying things, but my point is, if you are feeling depressed, it can help you identify patterns, it can help you stay calm, reduce stress and have more discipline. If you can consciously stop your mind from wandering and get into the habit of staying with your current train of thought you will be more productive and can stay in the ‘zone’ longer.