Here's what i've been doing, it's been working GREAT for me. it's not really a split that covers a 7-day week....since we're in exams now, and then on to break, i can afford to mix up the days i lift on.
Day 1: Chest/Back
Day 2: Shoulders/Tri's OR Bi's
Day 3: Legs/Tri's OR Bi's, whichever i didn't do the day before
Rest/Repeat Day 1
Day 1/Rest, whichever i didn't do the day before
Day 2, except if i did tri's on last shoulder day, i'll do bi's on this one
Day 3/Rest if i need it, whichever part of the arm i didn't do the day before
I do calves/forearms/abs every day provided they aren't sore or cramping up or i don't feel i'll really need them on my next back day.
I'm serious, this routine can DEFINITELY help you break out of a rut.