Some points:

1. .net vs. .org: It’s not universally agreed that .net is better. Some like .org better because it has a clear mandate (non profit organizations), whereas .net is somewhat aimless. But in general you are correct. .net domains are usually valued at about 1/10 of matching .coms.

2. ccTLDs: .in (India) is also very hot these days.

3. Brandable domains: I would add that many beginners get themselves in trouble by registering hundreds of nonsense domains that they defend by calling them “brandable.” Then when renewal time comes around they can’t afford to renew them all. So my advice is not to register or buy too many of these. Choose only the best of the best. So, for example, bodybook.com is not too bad, or domaino.com, or uk2k.com (I just made all these up, they might be available). But stay away from names like zazzafricious.com, stumpsjumps.com, or lutyforet.com. Total nonsense, in other words. And yes, beginners really do register names like those.

4. Word-of-Mouth: for utmost clarity and value, stay away from numerals and hyphens altogether.

5. Similar Sales: keep in mind that just because a similar domain sold for a bundle doesn’t mean yours will too, particularly if the sale was to an end-user.

Thanks again for your great post.