We just get a tree so no other decorations. But I love a more random, traditional looking tree - so the baubles and decorations are a bit old looking with a mix of gold, red, silver, green, etc. I don't try to make anything match and I don't buy sets of decs. I prefer to pick out individual ones that I like the look of.
It's how our tree was when I was a young child before my mum went a bit boring with one colour that had to match the wrapping paper, curtains, carpet, etc.
I'd love to get a big wreath for the front door but it's only really seen by the postman so I don't bother. I also love the idea of a garland above our wood burner but we don't have a mantelpiece to put it on, which is a shame. To be honest I'm never too sure about decorations beyond the tree! I've no idea where to put them.