Use the Find and Replace command from the Edit menu to search for the misspelled term and replace it with the correct spelling.
There may be variations of an author’s name in your data. For example, "Joe Cool," "Joe A. Cool," "J. A. Cool.," and so on. Since some styles prefer whole names and others abbreviated first and middle names, it is best to update names to full names and leave the work of abbreviating to the EndNote styles.
If you have developed a complex search to locate a set of references, use Change Fields to add a unique keyword to those references, so that the next time you want to retrieve that set, you can just search for the keyword.
You can add a keyword to a group of references using Change Fields. Use Find and Replace to replace a term with a new one. If there is a keyword that you no longer want in your references, use Find and Replace to search for that text and replace it with nothing, thereby deleting it (you might also want to open your term list and delete it from there so that you do not use that term again).
It can be useful to add the date or source of data to a batch of newly imported references. Only the imported references are "showing" in the Library window after importing. At this point, use Change Fields to add a word or phrase to any field in just those references.
Maybe your import filter or connection file consistently sent Note information to the Abstract field. Use the Move Fields option to cut all information from the Abstract field and move it into the Notes field. Don’t forget to update your filter or connection file so it directs information to the correct field next time!