How to find issues that at some point has been assigned to you?

Question

We use Jira extensively in our project, but I often have a hard time finding issues, that I know, I have been working on earlier. Usually, if some case is reported, that see

Answer 1

For those that will be using JIRA 5+, there is also CHANGED operator that looks at the field changing to specific value within specific time range.

assignee CHANGED TO currentUser() AFTER startOfYear() BEFORE now()

More here: https://confluence.atlassian.com/display/JIRA052/Advanced+Searching#AdvancedSearching-CHANGED

Just another way how to achieve the same result, but might be useful for other cases.