Every winter I find myself getting sad because of the weather. How can I fight this?
I am glad that you are getting ahead of this by noticing this seasonal pattern to your depression. Winter depression (seasonal affective) is something that affects a lot of people both people who also deal with other kinds of depression that happens to get worse in the winter as well as people who just deal with depression in the winter. Light affects how our bodies release and absorb neurotransmitters such as serotonin and most believe that a major contributing factor for winter depression is that we get less light when it is colder outside and darker outside. Exposure to light can make a big difference. If you are someone who is awake during the day (not someone who works the night shift :) )---one simple change you can make is keeping your curtains in your bedroom light enough as to let some light in in the morning. This will give you light right off the start of the day and can make it easier to get going in the morning. Beyond this, keeping windows cleared from blinds so that you get that natural light or even taking a short 10 or 15 minute walk each day can get you both light and exercise to help fight off the depression. Outside this, as others have suggested a light box is a popular method of warding off the depression however some of these may expose you to UV light and so this is something to check in with both with the light box manufacturer and with your doctor to make sure you have a good understanding of the risks and benefits for that. Lastly, just making sure you continue to do things that lift your mood, that you have time with other people, and that you reach out if you do find yourself in a space of needing help are all things you can do to ward off the depression. Wishing you well!