A lot of good information has passed your way so far. The hardest for me to learn is to turn off the caller, and to watch my volume. To me, it seems coyotes are much more sensitive to volume than bobcats.
Also, what worked one day may not work the next. If a cottontail doesn't bring them in, switch to a jackrabbit-even if you don't have any around. Red fox calls can bring them in as well.
You can try a fawn distress, especially right after they are dropping. A trick with that I've learned is set up next to a barbed wire fence (there are loads in my area), and shake it around while using the fawn distress. It works better with a partner, with one working the fence/call in a low spot, and a shooter. The caller still needs to check his six, as you sometimes never know where they come in.
Later in the season, a good go-to call for me to use is a few howls, then switch to a hurt pup. Repeat a few times, and mix up the order. Sometimes just the howls work, and sometimes just the hurt pup.
Mix it up, watch your volume, and the wind. You will have luck, but hunting coyotes has a steep learning curve. Good luck!