You now can keep track of the last 100 queries you've made in the Recent Queries dropdown on the YQL Console.
This is available to FireFox 3+, Safari 4+, Chrome, and Internet Explorer 8 users — we know you're probably using one of these browsers already :)
We used YUI's storage utility to implement this easily.
The queries will persist — even if you close the browser down and restart — where previously it only kept session-based history. Simply choose Clear to erase your recent queries.
If you want to save a frequently used query, you can save it by using the Create Query Alias link. Not only will it customize the REST endpoint for your query, it's a great way to keep favorite ones handy. Note: You have to log in to use the Create Query Alias feature.