Another hint, after you have arrived at a value by one method (codes, DMM or marked on the bag) try again using another method -- but first ask yourself, "What value or code do I expect to see?" If you have a bag marked 470K, what color bands do you expect to see? What multiplier band should it be? Where do you expect to see decimal points on your DMM? (Take into consideration what DC resistance setting you're using!)
I'm usually pretty anal about this, but I made a decimal point mistake a few builds back that wasted an entire evening debugging and fixing. I've always done the "more than one method" method, but it's easy to convince yourself that the value you see is the correct value. If you work backwards, any mistakes tend to stop you in your tracks.
