With two hours a day, I would develop a weekly routine that involves some of the following, some on a daily basis and some once / twice per week depending on what sort of activity / results you are seeing:
- Daily check of Analytics and Webmaster Tools (404 errors, messages, crawl stats, etc.)
- Full set-up of Moz Analytics to take advantage of analysis and tracking here; daily / weekly checking of campaigns (Moz emails weekly updates, which are useful).
- Regular download / checking of your own site's backlinks
- One or two content projects per week (more on this later)
- Regular site crawls with a tool like ScreamingFrog to complement what you're receiving through Moz, checking for on-page errors, redirects, etc.
- Short check of SEO news outlets like this one, Search Engine Land, Search Engine Roundtable to ensure you understand algo updates, interesting and relevant new ideas, and industry news, but perhaps without getting bogged down in blog posts / news that is not relevant to your business.
Regarding blog posts / content and low readership, think outside of your target market when it comes to readership. A good example of a company doing this recently was Aviva, a UK insurance company. They didn't optimise the potential links aspect of this, but they could have done so for a very good result.
They conducted a study on the over-spending of first-time parents, showing how much money is "wasted" on things parents / new babies don't really need. The mainstream press covered this pretty well: I actually read about the study in a hard-copy newspaper rather than online. Online, they did not conduct outreach well to take advantage of this study (lots of mentions from newspaper websites, etc. with no links), but the premise of the study was great.
Why was it great? Because insurance is pretty boring. But new babies are not boring to Aviva's target market, and they are not boring to a whole lot of other people besides. The baby industry is worth billions worldwide. They very effectively tapped into a subject that a lot of people would talk about, and that subject is at least somewhat related to what Aviva does (personal / family financial services).
So what about the delivery business?
Well, how about a study on the amount of money lost worldwide from delivery accidents, poor packaging and logistics, etc.? People tend to like stories about the wastage / saving of money at scale.
Or a study showing the average number of miles traveled by different types of products in international shipping, e.g. "the average piece of lamb from New Zealand travels X,000 miles from its farm to grocery stores, given that New Zealand ships lamb to Y countries worldwide. Z,000 tonnes of this is frozen whilst N,000 tonnes is chilled", etc. Tailor this to what you usually ship or leave it generic, focusing on logistics as a whole. As in the Aviva example, it doesn't have to be super tied to what you do - Aviva does not sell nor specifically insure baby products.
What you're looking to do is create content that is relevant to your potential customers and to other people besides, but is not necessarily about your subject matter if your subject matter is pretty boring. Your potential customers or "people in your industry" might not read or write a lot about the industry, but they are people with interests nonetheless, and you can tap into what DOES interest them.