If you feel overwhelmed by the amount of things you have to do, I find it helpful to pick a single thing and make that the only goal of the day. You don't have to complete it, just start it. This way the stress of all the other topics is reduced. Starting something is usually enough to also complete it. Once it is done the feeling of accomplishemnt can motivate you to pick a second topic. Rinse and repeat from there, as far as you are able.