Dry fit your pieces into the shape you desire.
Then use the wood stain on each spool. To make it easier, add the spools to the end of a paintbrush as shown then use another brush to apply the stain.
Apply the stain, allow to sit a few minutes, then remove all excess with a rag. This will give you a rustic finish in just minutes. You will also want to go back and stain the inside of each spool.
For the star, I used the silver Vintage Effect Wash with the same technique. Set all of your pieces aside to dry completely.
Dry fit them together once again.
Now you can start adding glue. I found that gluing them together in pairs first helped me to handle them a bit better. I added glue at both the top and bottom. You want a glue that dries quickly and has a strong bond.
Then turn those pairs into rows of spools the right size for your tree.
Then just use more glue to secure your rows together. I used additional glue at the top for my star. Use spare stars or anything else to hold it up while it dries.
Once your rustic Christmas ornaments have dried, add a piece of twine to the top with additional glue and add to your tree.