ive had a few late night build sessions.... now when im getting tired, or to that stage where i need to take a breather, i tend to set the glue bottle down, and take a nice break to refresh my mind, so i dont make any stuid mistakes (not that there are any "smart" mistakes).
on one of my builds, it was fairly late, and i did the classic make 2 left hand parts instead of one for each side of the plane. i felt like a complete retard the next day....... but ive learned from that mistake.....kind of......