When you wake up tomorrow, write down one goal you want to accomplish that day. Let it be as low-bar as necessary, like; have a shower.

Once done, and I realize that sometimes even a shower can seem like an impossible task, but once done, cross it off. The satisfaction from just that can be extraordinary. You can spend the rest of your day knowing you made a decision and completed a task.

Try do this again the next day, maybe add another task or two, as long as you feel like they are achievable. Eventually, you may find yourself completing other tasks you never wrote down.