i don't know if this has been posted before but i couldn't find anything about this topic.
o.k here we go.
The thing i am talking about is called "Google History" it shows all your searches from the start
you opened your google account.
I opened mine back in 2006, so i see all my searches all the way back until 2006 also youtube videos and picture search you looked in Google for.
I think its a good tool, just wanted to share this info with you.
Here a small guide:
1e. you have to have a google account.
2e. Log in (Sign in)
3e above on the right side where your Googlemail adress stands, click on that!
4e. Go to Account settings
5e. On the side that appears in the middle column the last one, click on "Web History"
The rest is self-explanatory
If you have an account take this link then you nearly there
Google Web History