As a huge Google fan, I try to be updated about the latest new features Google presents.
An agenda with free sms notification makes my life a lot more easy. You know when use try to use an agenda, but still you forget to look in it at the most important times. You forget sometimes an appointment with the dentist. Not anymore. Google offers free sms notification.
Also Picasa has a lot to offer. You can store 2 Gig photo's on the web, if you make the quality web-based you can put you're whole life in there. You can map your photo's, so you can see with a google map where the picture was taken. You can also use an embedded flash tool to show your pictures everywhere:
And don't get me started on iGoogle or google analytics, whow, this is really crazy.
Google also lets you keep your web history. A few days ago I was looking in my mail for a aknowledgement about something I ordered, but I could't find it. I forgot which url. I was a little desperate, because I paid with credit card, but didn't recieved a mail to track the order. I ended up in my google web history and after a while I founded the search text I used to find the website. And I got my order back.