if you are living in Thailand you should get a proper visa! The visa exemption is for tourist purposes and it is just a matter of time until you will get denied entry because of that reason... As Thailand starts with the ETA system (around new year) you will not be able to continue doing what you've been doing...
It depends on where you are applying from... In some countries they don't have e-visa and you need to go to an embassy/a consulate in person. If the country you are in use e-visa you submit your application there.
my reply was not about that. My reply was to your statement "It wont be Australia..." since it WILL be Australia. They are the first to use ETA when coming to Thailand.