I do what I call "block ins" and lots of them. Here's a few from here in my RV.
If it looks like they're done in chalk, that's because I do a lot of my block ins in black and white oil paint. I love this process! These are some small format paintings, but by putting things in black & white, I can see if I want to continue. Because they are at such an early stage in the painting process...I don't stress about them. It's very fun for me!
If you look in the middle of the above photo, you'll see the block in of this little ballerina I have up for auction on Daily Paintworks.
These small paintings are a nice & fun change for me. Sometimes I feel like I'm always trying to come up with class paintings (for the painting classes I teach) and it feels good to just paint. :-)