1-      This is the most efficient way to get immediate traffic for your blog. Assume you have a tech blog, and you are between the top 5 commentators on famous blogs in your niche, rest assured that you will get good traffic from there. Readers have the propensity to click on commentator's hotlink to know more about them. But having said that, one must keep in mind the right way of implementing this technique. Following things should be followed while commenting on high traffic popular blogs.

1. The blog must be of related niche.
2. Give a useful and productive comment.
3. Subscribe to 'Follow-up comments' and aggressively take it further.
5. Learn the ability of taking analysis in positive way.

This is yet another outstanding technique to get immediate traffic for your blog. Sign up on different high traffic forums of related niche. If you are a new forum user, it will take some time to get used to with forum etiquette; else you can start right away. Identify popular threads and jump into the bandwagon. You can also start your own thread with some hot topic. Remember, if you managed to create a popular thread on high traffic forums like Digital Point Forum, you will get tons of traffic for long time to come.

Build a network on Digg, StumbleUpon and similar sites, and use your network to bookmark and promote your blog posts. Digg and StumbleUpon are known to send huge traffic, once the post gets sufficient votes from the community. Make sure you do not abuse it and take care of usage approach; if not your blog may be banned on these sites.

And last but not the least is an advertising option. If you have the required resources and if you are worried for instant traffic, you can sign up for some good CPC campaigns on poplar advertising networks like Google Adwords.

Now its up to you how much time you give above methods and take advantage.