How to think about your errors
When it comes to trying to fix errors, you should prioritize them. Disregarding ease of fixing (which is important), the following is true:
The importance of an error is a function of its magnitude (how bad it is) multiplied by its frequency (how often it happens).
In other words, a little error that happens all the time could be more important than a big error that happens seldom.
This comes from poker literature (e.g. Miller/Sklansky) but applies to a lot of different fields.
