His top 5 list is ok, the only thing you really need to be careful with is #2 article submissions. 3,4,5 are must do’s.
Personally I don’t think using only 5 methods is enough. This isn’t 2005, SEO is now almost a full time job for webmasters which is sad really. I’d much rather spend my time doing things I enjoy and SEO isn’t something I enjoy doing but I do like seeing sites go up in SERPS and seeing traffic increase.
I came across this last week and just smiled because it’s something I’ve already been doing and think it’s key going forward. Even if you’ve already figured it out, it’s a good refresher. Top 1 SEO Tips for 2013 | SEOmoz