If anyone has not had a chance to look at Nina's tumblr where she drew every day in a 2015 calendar book, check it out at the link above.
Also, I don't know how to link to this particular question/answer page in her tumblr, so I'll post the screen shot:
Great advice, right?
Here's my attempt to capture some flowers I bought for the new year. I like the top part - the looseness and variety of color in the Freesia. The composition could be better, for sure.
Stonehenge notebook