Half of this is common sense, 'make an about page, make a contact page', that is basic...
Then there's a ton of stuff here that is hypothetically cool to do but practically speaking will not be productive.
As a marketer I can tell you that there is some pareto optimization that can be done here. It's likely, I think, if you did this whole checklist that you'd find 20% of your efforts ended up bringing in 80% of your conversions. The trick is finding what that chunk of extremely lucrative marketing activities are for your product/industry.