Have a look at the Thread Michael wrote on taming and getting your bird out of the cage
http://theparrotforum.com/viewtopic.php?f=11&t=227My budgies and Cockatiel were all young birds but in no way tame. My cockatiel managed to bite me hard enough to cause bleeding . . and yes it hurt like hell. Taming these birds was pretty straight forward as I basically followed Michaels steps.
I now have 2 Green Check Conures which I've purchased for breeding, but I still wanted to tame them as I like to take my birds out of the cage for cleaning up the cage etc and I didn't want to do this and stress the birds. Both birds were in the 18 month to 24 month range and never been handled by people. I still followed Michaels steps and they now tolerate me and will step up etc I must say it was a lot more work with these two birds than it was with the younger birds but it is still possible.
I suggest reading Michaels thread twice to make sure you understand it and I'm sure you will get there.