We typically recommend doing the drills first - to warm up.
Drills emphasize concepts that will be used in the homework and give you more practice with the basics, such as conditional diagramming, writing out logic game rules, and analyzing arguments. We suggest using the drills for a quick review after completing the lesson and as a warm-up tool before starting the homework.
But you can also do the drills last - to cool down.
Some students prefer to complete the homework first, especially if they like to focus on going through untimed LSAT questions. You're more than welcome to use this reverse method and go back to the drills once you feel comfortable applying timing pressure. This is a great way to drill down on your understanding of the concepts!