Hmmm, in MY opinion, teaching a bird to do a somersault (flip on the floor) is alot easier than teaching them to roll over..
Fargo does both, but he learnt somersaulting ALOT quicker than rolling over!
My five favourite tricks of Fargos are:
1. Somersaulting
2. Sticking his tongue out on command
3. Rolling over
4. Getting shot off my hand, falling back and playing dead
5. Going down a slide
But its fun when people ask to see tricks.. I like to show them
1. Hello on command... That way he seems friendly and talkative

2. Then i ask him to wave, or shake hands
3. Nodding yes... So i will say.. Do you love me? and he will nod his head up and down
I think sticking their wings up is a great help when going to the vets, and maybe even sticking their tongue out
These are most of Fargos tricks, not updated with his somersaulting trick though!
and then hes learnt to ride a skateboard as well

Fargo knows 20 tricks now, and learning a new one at the moment!
I WILL stop being lazy and finally teach him to fetch and start using props soon

[ame="http://www.youtube.com/watch?v=KPwvPhBTNAI&feature=youtu.be"]Fargo the most amazing bird! - YouTube[/ame]
But if you are going on which are the first tricks you should teach, as in which are the easiest, it would probably be:
Turn around
Shake hands or hi 5
Wave
Nodding
and going through a tunnel!
and flight recall, if you class that as a trick
