I just had FIOS installed and tipped the guy. I tip everyone, but this guy in particular had to run the cable line completely across my living room as the setup i wanted required having the TV at the opposite end of the cable outlet. When he was done, you couldn't see a piece of cable at all (he hid them in the baseboards). Went above and beyond, and I gave him $20 because the work he did was WELL worth $20 vs the time and hassle that would have taken me. Had he not done that, I would have still given him $5. I tip everyone, probably to a fault.