Today I am working on faces. In fact, I'm probably going to be working on faces all week. They have been a weakness of mine for too long.
Here I am going back and forth between male and female, different views. While this is harder, this is actually how you learn faster. Variation and volume are the name of the game.
In Keeping with what I suggest for others this whole page was done in 30min. Get the big stuff right and the details will follow. I learned a ton about what I'm weak at just from these 5 instances.