Latest Covid Avoidance Recommendations?

I have managed to keep a low profile since the start of COVID and have avoided it to date with the usual methods of mask, distancing, vaccine, etc.

I have an event coming up where these methods won't be possible. I won't be able to wear a mask and it is indoors so will be hard to distance.

I'm OK with that, but curious if anyone has any hacky recommendations of methods to reduce risk in lieu of the typical methods? Preferably low risk high reward type methods.

As an example I am considering an over the counter Azelastine nasal spray.

Chances are that I won't use any of the recommendations but it will be interesting to hear what everyone says.