Setting trends on the Official Google Blog covers a great holiday gift, a way to see your own top searches on Google. Very, very cool. You need Google Personalized Search active. Got it? Good, now go to your trends page. There you'll see the top 10 searches you've done, the top 10 sites you've visited and the top 10 things you've most clicked on.
The time period isn't given, and I'm gong to follow up to find out more the difference between sites visited and top clicks, since they feel very similar. You also get nice charts of monthly, daily and hourly search activity -- though what time zone that hourly activity shows isn't said. I'm guessing Pacific. If so, nice if you could adjust this to your own time zone in the future.
By the way, click on any of the bar charts, and you'll see details of the particular time period you've selected, in terms of top queries and top sites.
Finally, you're shown the top five things other people searched for that are similar to your searches. That's less than impressive, at least for me. Check out my list: