Manual submission is always recommended but for automation you can use tools like imautomator and onlywire.com
This^ You can't compete 20 manual bookmarks VS 1200 automated, and by the way bookmarks are a very safe even on your money site
http://www.stumbleupon.com http://www.facebook.com Stumbleupon is one of the best socialbookmarking... I used to get good amount of impressions from it..
Sounds like a real proven winner. One can do 30-40 social bookmarks and et some really great link juice. I've been skeptical of automated stuff anyway. What if Google updates its algorithms and the software no longer works? Big risk you're taking...
I have also same Question about bookmarking I don't know what is bookmarking tool please tel some about bookmarking tool which and how to use this tool.???