I usually count out how many trials of the activity I want to complete and then put that many pegs on the board. I also set out something to put the pegs in. You can use a washed Lean Cuisine tray or a meat tray. I got my meat trays for free at Kroger. I asked and they donated a bunch to me. So don't worry, there was never raw meat on my trays!
As we start working, I take a peg out for each trial of the activity and put it on the tray.
When we are done with the trials all of the pegs are in the tray. This is a great visual way to show the student that they are all done. Some students may need some time to get used to this system, so you may want to start small. You could start with two or three trials at a time, give a reinforcer, and then try a few more trials.
I hope you like my way of trial tracking. If you enjoy my posts, please follow me and "Like" my page on Facebook- Speech Universe. Thanks!