Guide? You mean you pay somebody to show you where the fish are??
I haven't had the pleasure of using a guide very much. Wish I did, because it would mean i'm away from homewaters and trying out a new species, or waters. Anyway, i'm pretty much in line with everyone here. I've tipped 10-20% or a flat amount of around $50. I like the flat fee, since it's more or less, a no brainier. [edit] Just to add, I haven't paid more than $250 a day for a guide. Rates have gone up since my last trip.
Since there are a couple bad guide days posted already, i'll share one of mine. Fishing the Togiak in AK. for a week. We rotate guides each day and on this day we get the new guide that came in on the float plane we did. Really nice guy, but...... Up early to beat the other boats. At O' dark thirty we take a boat ride(very cold boat ride)down river and you have to know the channels, because there's shallow gravel bars. First we have engine troubles, that the guide is clueless about. We stop/stall a few times and fall behind the other groups. Finally, we chip in and make some 1/2 butt repairs ourselves, and get going again. Then we hit a gravel bar. Then he gets lost, and I have to direct him to the side channel we're looking for.....already full because we were late. I didn't mind much, but my fishing partner wasn't too happy. The other guides had a cache of spots to try. This guide just followed around the other guides. On this trip, we all made one bulk tip at the end of the trip. I assume they evenly split the bulk amount amongst the guides. Might not be fair to the guides, but that's how the outfitter preferred it.
briansII