It's not who and how many links are linking to your web site that will help your search engine ranking but the quality of the link on other sites to your web site. Farm links can be a detriment to your site showing how you just don't care who links to you. Consider the quality and subject of the site.
Consider these links as relationship builders between you and your online viewers, vendors, and associates. They are looking to you for quality information. Your link page should provide the type of information of interest to your online viewers. The same goes for who is linking to you. They should be providing a service for you.