fredwyatt7777, I'm sure that everything could work if you will do it with good quality.
And I didn't catch, do you interesting in blog commenting or in guest blog posting?
1) Blog comments. I'm sure that it's work. If you will do it manually on good sites and without commercial anchor text. Use co-citations with wikipedia and other big sites.
2) Guest blog posting. It's work with quality posts on good sites.
Cheers