I just took the plunge into LF this year, and with all the disastrous mistakes I made with medium format while shooting in Chicago last week, I seriously wonder if I'll ever get anything good when the 4x5 finally leaves the house.
I don't seem to make the dumb LF mistakes *too* often, and I credit a habitual and redundant workflow. For instance, I dry-fire before every shot, which makes it a lot more difficult to leave the preview lever open by the time I pull the darkslide, and gives me another chance or two to remember to stop down. It doesn't mean I never blow it, of course, but I think it helps to reduce the frustration. Just work out an order of operations and treat it like the pre-flight checklist.
San Diego, CA, USA
The lady of the house has to be a pretty swell sort of person to put up with the annoyance of a photographer.
-The Little Technical Library, _Developing, Printing, And Enlarging_