The thing I've found that helps the best with anxiety for me is getting involved and volunteering. It helps move the margin a little and makes me at least feel like I'm at least taking action to help. Easiest place to start is with a casual reminder to any dem-leaning friends, family, etc. to make sure they get out and vote
The only people I know who even say they are thinking about voting for him are the die hard MAGA idiots. Every middle to non-extreme right leaning person I know says they're voting for Kamala. As long as people get out and vote I think she will win.