I haven't had a chance to calculate an accurate ETA for my next point
It's not rocket science!!!!
Log your departure time via the clock in the aircraft, or on your wrist (if not funky on 9.5 UTC such as Darwin/Adelaide) Write in on your flight plan, add the ETI from your plan to the departure time for your next reporting point and wallah!!!
What about "request traffic". This phrase is in widespread use by IFR pilots across Australia. IT IS COMPLETELY UNNECESSARY to "request traffic". Centre will always give it to you at the appropriate times. ALWAYS.
Not always.......most of the time when i'm in class E on descent to class G i'll have to preempt centre as we need to run decent checklists, brief, do an all stations call and talk to the punters. If we have not received traffic by 10 mile to TOD I'll request it.