Romex cable tidying in basement
I cleaned up the wires in my basement by removing the ones that were no longer being used for anything--old phone wires, TV cables, doorbells, even a security system that had been removed years ago.  This removed about half the wires I had. 
It looks like some of yours could be similar.  Then, if you have some wires that aren't stapled up nicely and are droopy, you can fasten them to well-secured wires with cable ties.