I don't.
I've got two ISP options, both rural wifi, and both of questionable reliability (one worse than the other). I work from home and rely on this to earn my living, so I just accept the $200-ish/mo I pay for an aggregate of about 15 down/4 up (in actual use). I'll probably cut the plans back a bit soon once I figure out better what they actually provide and I can fail between the two.
"Keeping my employer happy" is more useful to me than the money savings I would get (and, really, if I have one and it fails, I drop to cell backup, which is about $10/GB, so... doesn't take much there to be more expensive than my ISP, especially if a few work boxes pick then to update).