Contemplation is long, deeply connecting with an image, a landscape, or a thought. The word has "temple" in its roots and monks typically spend time in silent contemplation every morning. If you're writing a book on the meaning of the universe you're likely to do a great deal of contemplation. 

The contemplative mind is about being present to the moment, to the now, without judgment or analysis. Contemplative “knowing” is heart-centered knowing, where mind, soul, and senses are open to now just as it is. 

A sample of contemplation is this: 'I'm one among billions on the planet who are simultaneously consious individuals, as self-absorbed as I am. If all these other selves matter to God as much as mine, how marvellous it is. I say "Let such a Lord be blessed!"

Today new types of contemplation such as conscious breathing and mindfullness have become popular. Being aware of here and now, or of my muscles stretching and relaxing in this or that yoga posture is contemplation.

We all may resonate more with one practice or another, but whichever one you choose, commit to it. Contemplative practice will gradually rewire your brains and bones, slowly and in secret.