To be honest, putting them in a glass really helps me. Not too much of an arachnophobe but once they're contained I have absolutely no issues.
I recommend cardboard instead of paper btw, it's so much more sturdy and there's zero risk of the spider noticing a gap and escaping when tilting to lift it up. I'm using the same strategy for wasps that somehow found their way inside and refuse to fucking leave through the open window and there the lack of gap is SO much more important because I don't want a pissed off wasp escaping.


