I use command hooks!
Granted I don't have to get on a ladder, but it literally takes about 2 minutes to hang these four.
I left the hooks on my porch up last year, just to see how durable they were, and they lasted all year! The white hooks are of course less noticeable if you want to leave them up year round, but the green ones photographed better. You could also just remove the hook part and leave the little clear piece, for an even more discreet look- just remember where you store the hooks.