In the meantime, check all your third-party apps (anything that did not come from Apple) to see if they're ready for
Yosemite. The Mac App Store can show you any updates for stuff you got there. If you got them from the developer's site, that's the best place to check. You
did record any serial numbers, purchase dates, download urls, version numbers and such, right? (just another reason to use 1Password...
)
(A great way to see what apps you have that are not from Apple is to open System Information (press the Option key and select the Apple Menu), then select Software->Applications and click the "Obtained from" column header/label.)
Next, just continue with your regularly scheduled bootable backups. BTW, when was the last time you confirmed that a bootable backup would actually boot your system?
If you're
not making backups,
go ahead and try the new OS, when it crashes, you'll never forget to make those regular backups again... "Good judgement comes from experience. Experience is what happens when you make bad judgements."
Many developers have already issued updates that make their apps compatible with
Yosemite. I've only found one or two that didn't work on the
Yosemite BETA, but my tests were extremely limited and not very thorough. Still, most apps should work fine, but it would be wise to know of any that might cause you problems.
Finally, if you use your Mac for anything important, like earning a living
, just relax and wait for the early adopters to discover the things that are still broken! Even with the public BETA 'exercising', there are always a few things that are only discovered
after the software is 'set free'!