My 20c would be don't get too obsessed with getting it right first time Troy. Its a new learning curve with things to explore. It takes a while to get a feel for gain/offset, preferred temps, when and how to shoot darks/bias, not too mention flats (or how many filters to do those for). As Robin said new drivers can come along from time to time too. Processing becomes more complicated too, and you get variations in master cal frames between different software packages to some extent.
You can always shoot more darks or flats if you need them after a particularly successful imaging night, but just make sure you remember to do flats while the imaging train is together (or at least keep focus locked and measure the angle the camera is at very carefully).
Hope the skies part soon for your first light. Should be a memorable occasion.
