If you are looking for 30 backlink, the best way to get it is from, blog comment, guest post/ paid post and forum post.
If you have great content on your website, other websites will automatically link back to your site. So the keypoint is quality, not quantity.
I think you would like to try socialmarker [dot] com, and you need to register for each one of the site. As the registration complete you might want to bookmark one article per day. What type of website or business that you running for your blog?
Don't pick a number, pick a time. Tell yourself you are going to spend 2 to 3 hours a day working on backlinks.
I have tried many softwares, but none works. Now, I do everything manually. When you do SEO, only your brain and a Spreadsheet is the best way to get your site rank better. As everyone said, Quality links are really important. Links from your niche. So, for it, you can use commentluv blog search, like I do. It will give you blogs to comment which are related to the keyword entered by you. And once you have accumulated some quality links from blogs, then you can go for posting in the EDU site guestbooks or their blogs. Search engines give high importance to Edu sites.
why people going for automatic backlink building tool ? , as its danger in SEO , may be get penalize from google
getting backlinks from good pr article sites, are tedious but are more valued by google, as they share information, and not just some ads, high pr article sites are hard to get your articles listed, which makes their backlink more "heavy", for building backlinks use common sense, would you like to search google for a keyword only to end up with some junk?? Have a good one
Start by using popular forums and include a link in your signature. Another method is to form an agreement with an external website to include your link in their website, whether with money or by providing his link-back to his. Goodluck.
it makes me laugh that people think they can obtain X amount of backlinks in 1 day. Even if you submit 30 articles to instant approval directories, most won't get crawled for a week or so, which means the backlinks wont be counted or take effect for at least a week. anyway, as somebody above said - you are best to get fewer backlinks from GOOD sources rather than lots of backlinks from poor sources.