I get bored in the arena. These are some things I do. Sorry if I don't explain these very well & some of these things I do just for fun.
1.I'll work the fence. I start at a walk & progessively go faster. Up & down the fence 1/2 way then turn into it getting your horse to pivot on his hide quarters instead of the front. Then do the same thing but get him to drop his shoulder & turn on the front.
2.Practice side passing,going backwards, emergency dismount from both sides, getting on from both sides.
3. A competative trail course ie..small jumps, a bridge, lay down a tarp, set up a flag,lay down an L or a keyhole shape with some poles.
4. Put some buckets on the barrels & practice picking up an object in one bucket & putting it in the other.
5. Practice cowboy polo (broom & beach ball). If its just you, use the broom to move the ball from one end of the arena to the other.
6. Most recently we took a cue from the on the girls at The Knights of Long Gone Ranch
on the forum & did some jousting with pool noodles.