Whether you love the scent of a real fir or prefer your trusty artificial one, a tree is the focal point of your room, so the decorations are important.
If you're more the minimalist type, why not got for some white fairy lights, set with a timer so they flash at intervalsl, and some simple classic baubles.
For something more eye catching, try a specific colour theme like purple and silver or red and gold.
Or if you're feeling brave, why not get the kids involved and let them choose the decorations? It'll make them feel more special and give you a bit of a break - they'll love you for it!