1. Try and be active on the popular domains and blogs related or unrelated (with good participation and high page ranks). Even if they do not directly relate to your interest try your hand on them rather posting on inactive though relevant blogs or domains (You will often find relevant domains are not much active anymore). It gives results quickly in terms of visibility and the people noticing you may be much more.
The key to SMO as I mentioned in the title itself is patience. Keep doing your part and wait, results would show after a little while. Just remember all this would yield results in some time, but if not properly supported by an equally good Search Engine Optimization(SEO) they may soon fade out. At this moment I would really love to look at the smiles on the faces of those who read this article just after or in between their SMO assignment, I am sure they have a story to tell.