When people are depressed they tend to withdraw from others or push others away with their critical and negative ways. This will increase their depression and hurt the physical health, as well. Some other suggestions. Relaxation and visualization exercises can be very useful in reducing anxiety and worry. There are many available in most book stores.
Caffeine is a stimulant.
If you re drinking more than 2 or 3 cups of coffee a day, it can increase your nervousness. Do not drink alcohol right before bed. While it may help you relax initially, it increases restlessness during sleep and you will not get a good night's rest. A gratefulness journal can get purchased or created from a notebook. Make a habit of writing in it every day.