I just KNEW this new Coby was going to cause trouble!!!
I think that's the toughest one for all of us! My Coby just doesn't get to be off leash outside. Sad, I know. All I can suggest is to never stop practicing the "come" command. We always, always, always give a treat for coming (assuming that you do train with treats, of course). And one thing that I learned from someone is to not only make sure the come to you, but also make sure they let you touch their harness before the treat. That will make sure they don't learn to just come and then dash away before you can grab 'em.
That being said, there are very few lucky people that have one that is 100% trustworthy.
And don't forget that in a crisis, running AWAY and back to safety yourself will usually get them to run after you. They don't want to miss anything cool you might be planning.