I always use the Line Tool to draw arrows (by setting an Arrowhead at the end), like this:
Is there also a quick and easy way to draw bent (arched) arrows, like this?
Use the Line Tool:
If you are just using lines and attaching the arrow, use the pen tool to create the curved line. Then add the arrowhead as you have been.
I prupose you to :
As photoshop is not the best software to do that, you can also create the arrow in Illustrator, and copy/paste it on photoshop. You will be able you modify it with double clicking on the arrow's layer.
I hope it will help you.