I'll admit right from the start, that I originally forgot to add the additional branches, so I  began by adding leaf shapes to a sketched circle 

I built up the different colours of leaves before adding the 'branch' wreath.

I do like how full it looks, even though I'd completely forgot about the additional branches.

So I started a more Summer themed second wreath.

And built up the coloured leaves.

I quite like how they look together, though I'm not sure about the 'berries'.

There's definite room for improvement!