Forum posting and guest blogging are best off-page technique to get quick result.

I only comment in simple words. No techniques or any bunch of information as we all are well aware of them. Just apply the techniques you know and then analyze your site though moz, raven or any other tool to figure our what type of on page techniques your site is lacking of. Just keep on gripping those factors your site would have all the necessary on page factors that would help your site to get on top positions.