I used to call my wife when I got to work, and call her when I was leaving. That caused one problem; every time her phone would ring with my ringtone ("One Bad Stud" by The Blasters, because she hasn't taken the time to figure out how to change it) her heart would leap into her throat, thinking that she was getting the "both my legs are broken, I'm in the hospital" call.

So now, for routine "I got here" and "I'm leaving" calls, I send a text message instead. She doesn't have to make a mad dash for the phone if she hears it ring, and if she's in the middle of something she doesn't have to stop it to answer. This also has the added advantage that if I DO call, she knows she needs to pick up. Fortunately the last time was just because my chain broke in two places (still trying to figure that one out) and I just needed a ride. (My kids get a big kick out of the occasional "rescue Daddy" missions.)