I guess our (mine and Ebony's) biggest achievement has been starting obedience training and managing to get to class three at the club (it feels more like my achievement than Ebony's - it certainly was not the dog holding us back).  I think it helps a lot that I live with the world's harshest critic, so when I come in off the field thinking I had a good session, MrsD will "gently" point out my errors.   
I also acted as steward at our club trial (which was easy as it just involved doing exactly as MrsD told me - something I have been practising for years). 
Next year I hope to do at least some of the following: 
Ebony through CCD and possibly CD 
Ebony or Jarrah to an endurance title (if I can find the time to get fit enough) 
Agility - especially if MrsD trains Jarrah and I can just take him in the ring and get all the glory   
I sort fo like the idea of doing the dogggy dancing thing too - I loved the Richard Curtis seminar we went to.  I just have my doubts about finding a suitable set of moves and piece of music for a clumsy uncoordinated boofhead (and Ebony is not much better). 
Cheers, 
DagBoy