I'm sure you don't need me to tell you that analyzing the link profiles of your competitors is one of the best ways to find backlink opportunities for your website. Launching a new website without putting 301 redirects in place is literally committing SEO suicide. Not only will you lose all of your past SEO history, your rankings (and traffic!) will plummet. Always, ALWAYS 301 redirect your old site pages to your new ones to let Google know where your new content can be found. By quoting influencers in your industry, you make your content more authoritative. Linking out to relevant websites is great for SEO. No matter how much fun I have with my responses, people often seem disappointed (if they do not chuckle). For SEO to truly work and be sustainable, it needs to include a process of build up. Any SEO consultant who says otherwise is fooling you. SEO is an ongoing effort, but one that is totally worth it.