Curiously, there seem to be people interested in actually doing this sort of thing.

For example, it is argued that one could never record enough sensory experiences and actions to produce brain emulation [Gemmell, Bell et al., 2006]. However, this is the right answer to the wrong question. The question is not whether one can replicate the 10 trillion synaptic strengths and yet greater number of connectivities of the human brain in a software matrix. This would be like trying to replicate human flight by building an airplane out of a trillion micro-widgets in the exact same configuration as found in an eagle or a sparrow. Instead, the goal here is to replicate the functionality of a specific human consciousness in software. There is no more reason to assume a priori that the only way to do this is to replicate a human brain than there is to assume a priori that the only way to fly is to replicate a bird. Instead, we reason that software emulation of a human mind via analysis of a set of mindfiles is achievable because there are but a limited number of personality traits [Costa & McCrae, 1990], a finite set of universal facial expressions and emotions [Brown, 1991], a diminished repertoire of remembered thoughts from day to day [Ebbinghaus, 1885], and not more than a few gigabytes of remembered information [Landauer, 1986].

In general, dozens (n) of mannerism, personality and feeling types (m) yield many thousands of unique human combinations via (n!)/(m!*(n-m)!). Once you add to these thousands of personality and worldview templates differential recollections, beliefs, attitudes and values (the gigabytes of remembered information) there are many billions of unique possible combinations of human psyches, one of which will be a best-match for digitally stored mindfiles on a predecessor biological person. Mindware best fits one of the “m” compound mannerisms, personality and feeling types to that analyzed from stored mindfiles, and then populates it with the recollections, beliefs, attitudes and values evident from the stored mindfiles.

From "The Terasem Mind Uploading Experiment". Not sure how seriously to take them, but my own readings have been inclining me to the point of view that personal identities are just not that information-rich.

Also relevant is another paper in that issue, on very large scale use of personality questionnaires: http://www.worldscinet.com/ijmc/04/0401/S1793843012400082.html

Writing might be inferior to lifelogging as a way of preserving yourself, but it might actually be better than lifelogging as a way of having a specific type of impact on the future. Since neither form of reconstruction is going to provide the same type of experiential immortality as cryonics potentially would, why not attempt to reincarnate your ideal self?

(As far as general anthropological data goes, there's going to be plenty of footage of average schmucks doing random stuff.)

Unfortunately, lifelogging is illegal in my home state, and in many other places. Specifically, it is illegal to record audio here without informing all the parties being recorded, which is prohibitively impractical when you want to record 24/7. (There is no similar restriction for video, but video is likely to be less useful for reconstruction purposes than audio.)

What's the situation with commercially available lifelogging software/hardware? Can I just put in some money to get a recorder and start using that, or does it still involve a lot of customization to get something that might or might not work very well for the purpose?

If we're going to try to preserve ourselves through recorded information, wouldn't it make much more sense to instead spend a few hundred/thousand dollars on lifelogging?

But that does not have the advantages over cryonics that gworley uses to argue for writing. Cryonics at its cheapest costs $1250 for a lifetime CI membership plus the recurring life insurance payments. An initial investment on lifelogging combined with the periodical maintaining and/or replacing of equipment ought to be comparable (although you could count on technological advancement to bring these costs down as time goes on). And I don't think lifelogging is significantly more socially acceptable than cryonics.