I enjoyed teaching Maggie "left side" and "right side" when we take walks. I can say "left side" and she'll move in front of me to my left side. Same with right side. She's so smart, as are most boxers. They learn so quickly, sometimes even if you aren't teaching them.
Since I have two boxers, I taught them "Position" command. That means I want them side by side directly in front of me, showing off. It is my "ego" command. People are so impressed when they trot along, loose leash in front of me, side by side in perfect unison. Like little soldier girls, heads held high and that boxer trot. I just beam with pride. (And I love watching those cute little backsides.)
There are lots of other commands I've "had" to teach them such as, "NO SQUIRRELS" and "NO CATS" to keep them from trying to "get" the squirrels and cats.
I use "Next to Daddy" when I want them right by my side in case a bicycle or car is coming behind us, etc. I think you'll find as you are with your dog more there will be more commands that you need to teach.
Susie loves to play fetch and she is so good now with the "drop" command and will drop the ball at my feet after fetching it every time. Maggie has picked up the command just by watching Susie and seeing that Susie gets praise and love whenever she does it. Of course, whatever Susie gets, Maggie wants. Jealousy can work in your favor if you play your cards right.
"Off" is a very useful command, I use for Maggie to not jump on people or to get off the couch or bed (when I'm trying to change the sheets - she thinks that's too much fun to interfere with daddy making the bed.
Lots of boxers can identify individual toys and colors too. You can try some of those commands. Name a toy and train to get the "red ball" or the "fuzzy ball" and they will learn which ball is which and get the right one every time (unless they want to play with the Green Ball that makes all the noise, then they'll look at the right ball, but bring me the green one. Silly girls.
Maggie and Susie both have learned "LIFT" command, which is when they get their leashes caught under one leg. I say "LIFT" and they will lift the leg so I can get the leash from under it and corrected. That is one of the things they do that makes me so proud and glad I have boxers!!! They are incredibly smart. gradicon
I also use a "Wait" command when we walk, instead of sit all the time. We use it at crosswalks and intersections so they don't always have to sit on hot concrete, but have to stand and wait until I say "OK, Come" and they trot along and cross the street.
I found it helpful for me, as well as them, to talk to them constantly when we are working or out on walks. I use our walks to train a LOT. It is more fun for them and keeps the walks from being boring and the training from being tedious. When I see a spark that they recognize a word, I continue to work on that word and use it as a command for them. I watch them and look at them constantly as well, and find that they are eager to learn and will look up at me wanting the next command. They are, after all, working dogs and working dogs need to know what is expected of them.
Good luck and have fun.
) Good luck!!