To be honest, all beach shots are the same and sometimes it kinda make me bored looking at it. That's the point, I was just looking at it, I'm not the person taking the shots. Here's the challenge: I took beach shots with my precious model in the past. One month from now, I'll be taking more of beach shots and let's see if there are any difference.
When taking a shot, look for a point of interest or focal point that will give those looking at your photo a place for their eye to rest.
Not a very unique idea but a pattern in the sand, the crashing of waves is a fresh start.
Also look for the little things that tell story like shoes at the water's edge, sunglasses, etc.