My safety measures are my choices and not necessarily items, depending on the time of year and where I am (by where I am I mean if I'm on a North, East, South or West facing slope and the specific locale) because as the seasons change so does the food source and supply.
Prime example; Right now on the Eastern slopes of the Rockies a bears' primary food source are specifically Buffaloberries, a plant that grows in low laying areas like alongside a trail. It's considered "peak season" here, highest report I read, years old mind you, was 9 grizzlies in a 3.1 sq. km radius in Banff National Park.
So I'm a little more cautious with where I will be hiking/fishing/camping and constantly calculating the risk based on what I see such as Buffaloberries, tracks and scat (or there lack of). I always carry bear spray, lost my bear bell and can't be bothered to use "bear bangers" (firecrackers). I'm convinced a bell does nothing to deter a bear and unsure a firecracker will scare a bear when it needs to eat berries for 16 hours a day before autumn.