Art of the Shelfie, by @stokey_abode
You would have a pretty dull shelfie if all your items were all the same height and size. Group objects together and play with the different heights, you can create a more staggered effect giving a good sense of asymmetrical balance which is easy on the eye. I love the effortless grandeur this Bruce McClean piece gives this mantle arrangement.
Think diagonal lines… your eye tends to move from one shelf to the next diagonally and recognise related objects along the way giving a sense of pattern and similarity between the shelves. These mini pieces of art work perfectly sync in and complement everything else on the shelves with out overpowering. Absolutely mix up your textures and throw in some foliage to break those hard edges.