We all do; these things happen to all of us occassionally! More than just human errors, it is important to not screw up based on the characteristics of the meter. Already discussed has been the use of incident meters by finding similar light, and adjusting the exposre recommendation of necessary. Not mentioned, nless I missed it, was the use of hte time-honored general coverage reflective meter. That is just as good of an alternative as any other meter and it's just as quick as incident. The challenge is knowing the metering pattern so extremes in the scene don't provide misleading guidnace. Oft mentioned, as one example, is pointing a general-coverage reflective meter down a bit to avoid excessive measurement of the sky. One meter that had me a bit baffled was the Weston, until I found documentation of the metering pattern and actually read the "how to use" instructions. That meter has a pattern that is specifically desinged for the meter to be held in one orientation otherwise the measurement can be wonky. My contention and experience is that a decent negative can be obtained using virtually any meter type so long as one really knows how to use it. Knowing how to ballpark light/exposure in one's head is excellent verification!!