It is always better to have materials which can be downloaded with links directing to your website
. Another key thing is approaching the right SEO firm for marketing your website. They, in their work of increasing your SEO value, will certainly use one way links as an important tool. So, find a trustworthy and well established SEO company and get their help. Do not forget that you are in a highly competitive world and there will be websites which have similar content as yours. So, to gain popularity and to increase your profits, you have to try hard. One way links will certainly help you in this process.