While I don't have a good suggestion for something to do between battles, I do have a tip for getting all 5 into TB.

The trick is this: You need to be the first to queue, so you better damn well know when there is exactly 14 minutes and 59 seconds on the timer, to hit the queue button at exactly that moment. If you're not AT tol barad, this means keep an eye on the timer and watch it count down for the last seconds with mouse broadcasting enabled and everyone's queueing window ready. If you are at TB, there's one less click, you just wait with mouse broadcasting right by where the Accept box is going to come up when it asks if you want to queue. (Join as Group does not work)

Another popular question is how to keep your guys in the same group. One trick is to be the first to enter the battle. Again, watch the last few seconds of the countdown and have your mouse waiting right by the Accept button. The second the Accept button pops, click it.

If you're the only crazy bastard staring at that counter waiting for the exact instant, you are going to get into TB, and you are going to be group 1. The first timer (to queue) is most important because it's first-come first-served (you know, like the definition of a queue) and the rest of your guys just won't get in. If you are queueing 1-3 minutes after TB is queueing, it's probably already too late depending on the time of day.

Highly recommend TB to people gearing up even for heroics. Got me the TB weapon upgrade the other day, easy upgrade to 346