Hi If you are looking for instant back link then the best possible solution is reciprocal link building. In this case you will get so many back links but in case if you do not want to put the links on your site then go for 3-way link building and also go for off page activities which will also provide the some back links for your site.
The current trend seems to be Guest Posting, by writing quality articles for another blog in your niche. In return they will provide you with a link to their blog.
You can do off page works such as article submission, directory submission, bookmarking, blog writing & posting, document posting, blog commenting etc. At first, you can do these things in small numbers if you want to. Make a proper off page plan first, & then stick to that plan for about a month or two. If you are happy with result, then carry on, & if you want more, then you can increase the numbers. Don’t overdo it because then it will look like spamming.
create a dofollow back-links and do social bookmarking....Also Write a Article and submit in high pr website
These two activities gives you satisfied back links social bookmarking & forum posting in relevant forums sites
In Seo,Link Building Very Important.Link Building Roll Is Major In SEO.But To Incresing Your Site Keywords You Need Quality Link Building.Link Good Quality Back Links.Good Pr On Add Links.
To save your time , i recommend you to buy some tools but plz spend time to learn and use them carefully