I don’t know whether it is mentioned in other site or not but today I found a small tweak.I have tested this with blogger.com but don’t know whether it will work with normal sites or not.
Many a times you want to find a particular keyword in a blog and moreover that blog doesn’t have any search bar(like my blog).In that case you can find that keyword by typing the following code on your address bar.

URL of the blog/search?q=”search word“

For example: Keyword= google
http://infotix.blogspot.com/search?q=”google”