Networking - Little info and tips

Coming to the job hunting now i can completely realize and articulate the importance of networking while finding the job. Its true that more than 70% of the jobs filled by the referrals, because i have seen that happening with my previous work experience. MBA helped me to effectively build the networking among the local business community. Currently using famous networking websites like LinkedIn and Xing to expand my network. May be these networking will not help me for time being but in long term they will definitely going to be helpful.