My approach to steelbooks has morphed, taken a few concept changes, and honed itself over the past 6-7 months, to the following principles:
1) Do not buy every countries' release of the same steel. It is way too expensive, and it is a fallacy to think that all of them will be collectible. Choose one you like, and just buy that one for keeps. Unless you love the movie like no other, then it is a personal choice if you want a complete collection of a worldwide release. For myself, I will buy any new releases of Pulp Fiction, or Batman Begins, or Thor.
2) Assume 95% of the steels will not OOP before release date (look, even recent Kimchi exclusives don't OOP). Those that eventually do (e.g. Aladdin or T2 Kimchi), you probably can self-fund your own copy if you bought 3 and sell the other 2 on ebay with a profit (after deducting fees). For the rest of the 95% (e.g. Evil Dead 2 or Jack the Giant Slayer), if you bought 3 copies of each new release, you are going to have a storage issue at some point in time, or your spouse / partner nagging at you. So adopt igans316 approach, wait for it to be released, and buy those you want on ebay, at retail or even lower price.
3) There will be no new grails (there has been none in 2013, has there?). You will never beat the quality of the steels & such released 2-3 years ago, e.g. Terminator Salvation FS ironpack (Sunnyx's personal belief that it will be a holy grail), or what chipvideo calls the "golden age of German steels (e.g. Wanted, Zimmer 1408)
4) Avoid titles which are not a franchise (e.g. World War Z, After Earth, Place Beyond the Pines). No one will remember these movies or steels in 2 years time (Safe House anyone?)
5) Avoid Zavvi steels like the plague (unless it is a steelbook you want to keep for your own collection). For myself, I kept my Rocketeer order, even though the value will not likely increase, simply because I think it is a good-looking steel. But 1 copy only, mind you.
6) Buy Disneys; they are evergreen. If released by Zavvi, consider carefully. Personally, I will buy them. Look at how many members have Disneys on their want list, me included.
7) Buy all blufans releases, at least for now (until they do a Zavvi, which they seem to be threatening to do recently)
8) In the foreseeable future, buy FNAC. My faith in FNAC has not waivered over the course of 2013, I await its new release with great eagerness. Please Zavvi, do not take over FNAC. Wreck, please help all of us and put in your say!
9) Keep your grails (e.g. IM FS, Rambo Tattoo, Moulin Rouge ironpack), unless you need funds now. There is a high probability that 0.5% of steels will fly in value in 3-5 years time (This is Stevo's theory, as well as ChanFM's, which I subscribe to)
10) Just enjoy your hobby, and focus on things you like, or a segment. For example, I know Burragum now only buys lenticular steelbooks. Great idea!
All in all, don't get me wrong, I don't believe steelbooks are dead, and I still love collecting steel