One of my favorite features is the "When Hit..." option available on a breakpoint. You can print a message with the value of a variable along with lots of other information, such as:
$ADDRESS - Current Instruction$CALLER - Previous Function Name$CALLSTACK - Call Stack$FUNCTION - Current Function Name$PID - Process ID$PNAME - Process Name$TID - Thread ID$TNAME - Thread Name
You can also have it run a macro, but I've never used that feature.
