David Rusenko

Not a monthly.

So what I like to look at is say of that cohort, what percentage of them will either have renewed or upgraded or extended, right?

Those are kind of three things that you can do.

within the first term and then within the second term.

So T2 would be, you know, T1 would basically be in January 2010, T2 would be in January 2011, right?

And looking at those renewal rates by term and then effectively comparing cohorts.

So looking at the January 2009 cohort versus the January 2010 versus 11 versus 12 versus 13 and looking sort of

you know, apples to apples to make sure we account for seasonality and just looking at the trends in those cohorts and making sure that those are remaining really consistent or improving.

And in our case, they're improving, which is great.

And that gives you sort of predictability in the out years.

Yes, we've gotten significantly better since then.

You know, it's fun to watch you try to work it out.

My last business book, not the last one, my favorite one is the one on Admiral Rickover, The Rickover Effect.

Few I'm following or studying.

I mean, no one in particular comes to mind.

One person who has been helpful is Pete Flint of Trulia.

This is like a really cheap answer, but I'm obsessed with Boomerang for Gmail.

I would not be able to do what I do if not for that product.

What do I wish my 20-year-old self knew?

I think...