I like work/life separation, not work/life balance. What I mean by that is, if I'm on, I want to be on and maximally productive. If I'm off, I don't want to think about work. When people strive for work/life balance, they end up blending them. That's how you end up checking email all day Saturday.

I might seem biased, but I use Evernote every day. It came to me through my readers, who I'd asked for software recommendations via Twitter and Facebook. For seemingly every function, the answer was 'Man, you have to use Evernote.'

I started using Twitter about year after its very early adoption and ended up investing in it around that same time. I'm involved with the Tech scene and companies ranging from Facebook, Stumbleupon and Twitter.

I still feel there are much smarter self-promoters out there than me. I am very methodical about my messaging, and I know how to gain attention very quickly. David Blaine is an example of someone who's better at self-promoting than me. He is much better than I am.

I tend to split my activities into fun, income and legacy. The number of things in that finance bucket is pretty few and far between and doesn't consume much time at all.

I think there's a difference between having a bestselling book - meaning through marketing, PR and buying that first wave of customers - and writing a bestselling book. The second implies that the product propels itself to the best seller list.

I used Evernote almost exclusively for researching 'The 4-Hour Body.' I was able to eliminate all of the perpetually open tabs and multiple bookmarking services. It's also all automatically backed up to Evernote, which gives me peace of mind.

I've found cinnamon to be very effective for lowering the glycemic response to meals. People have heard that before, but I didn't realize how profound it could be until I did the actual testing with continuous glucose monitors. And I tested all different varieties and species of cinnamon from Ceylon to Saigon.

If retirement means laying on a beach and rubbing coco butter on your stomach, about 48 hours of that will be enough for most people. You'll want something new.

If you do something as simple as 15-minute ice baths three days a week, and you time those baths properly, you can significantly multiply your fat loss.

If you start out with a little telescope observing the stars and you keep at it over the years, as I have, it's kind of a dream to one day have an observatory where you can always go and use the telescope conveniently.

If you take a print magazine with a million person circulation, and a blog with a devout readership of 1 million, for the purpose of selling anything that can be sold online, the blog is infinitely more powerful, because it's only a click away.

If you walk into any bookstore, you can look at the newsstands and see which magazines are nationally-distributed, and you recognize certain names. Same with television. With the blogsphere, however, you actually have to dig, and know how to use multiple tools to figure out whom you should be speaking to.

It's very easy to confuse confident motion with being productive - and they're not the same thing. Productive to me means measurable outcomes that apply to my most important to-dos that positively affect my life. That's it.

Most of my readers think I'm obsessed with time management, but they haven't seen the other - much more legitimate, much more extreme - obsession. I've recorded almost every workout I've done since age 18. Since 2004, I've been tracking everything from complete lipid panels, insulin, and hemoglobin A1c, to IGF-1 and free testosterone.

One of the great things about stargazing is that it's immediately at hand for so many people. You know, you could get into scuba diving or bird watching, but the stars are always up there.

Online I see people committing 'social media suicide' all the time by one of two ways. Firstly by responding to all criticism, meaning you're never going to find time to complete important milestones of your own, and by responding to things that don't warrant a response. This lends more credibility by driving traffic.

Rather than spend my life on data entry and typing, I also take photos on my iPhone of business cards, wine labels, menus, or anything I want to have searchable on-the-run.

Resveratrol is fascinating stuff. One of the best sources of information about it is the Immortality Institute. They have a forum where some people are in the 500 Club, as they call it. They've been taking 500 milligrams for years. It's a really great source of data.

The least-crowded channel for meeting high profile bloggers is in person. Email is the most difficult, the most crowded... I'm a top 1,000 blogger, not a top 100 blogger, and I get hundreds of pitches by email every week. Most of them I don't even see because my assistant declines them.