To be honest, the best guide right now might be "How to make your queue pop". Not even sarcasm — tips like:
Not checking minority languages
Active times of day for NA
Drawing attention to community 'queue days'
Warnings about what content is deader than dead and will never pop
Explanations of what Jobs / Roles have faster queues (or don't matter, as in Frontlines)
Info, per datacenter, on which GCs are currently overfull and experiencing long queues vs. which GCs have fast pops (which might have the knock-on effect of gradually evening out the distribution a little)