Checking the frequency of a character can help a lot when you want to decide whether or not to study a specific character.
I've recently used this list: http://lingua.mtsu.edu/chinese-computing/statistics/char/list.php?Which=MO
For instance, somewhere I found the word 蹩脚 (shoddy). The English word is quite common, but the character 蹩 is merely the 4308th most commonly used character. Had I know that earlier, I probably wouldn't have added the word to my queue.
I've also been studying 戗 and 祢 (I would still study the latter one nonetheless), now surprisingly at no. 5957 and 6020.
Using the method has its flaws, e.g. it's based on a non-representative source and neglects current trends, but it can be a great tool, especially for advanced learners.
Importing the file should be fairly straightforward, and the new word popup provides a great place to show it.