Last few months I observed one thing that, every day in my blog something happened! 
That happened was spam, I have to deleted more then 50 to 100 spam in a day. That’s pretty bad though, but what I can do to stop the spammer. I just deleted the spam that was my job at that time! One day I went to a site and suddenly I found something that really a helpful and the best solution to spam protection for your blog.
That’s call reCaptcha, it’s easy to install in your site such as you can see in my blog. If you want to protect your blog or site from spammer then go to reCaptcha.net and register after register you can download the plugin and your reCaptcha api key. Its 100% free!
In my last few days experiment, I observe no spam no tension! 
Now I don’t have to delete spam, no spam delete no time waste.
Enjoy your blogging with reCaptcha!
{ 3 comments… read them below or add one }
but I guess few blogger are using this technology, if all blogger start using the thing then spammer will be destroy
lol, ya i might install this on my blog, but akismet or whatever (wordpress plugin) autodetects spam, and it’s been catching almost all the spam there is
yes my friend you are right akismet catch the spam well but spammer able to spam and you gotta delete the spam lol use ReCaptcha then you don’t have to delete then damn spam