Hi Jeff,
I think I can help you make butt joints. Here are some step-by-step instructions to build one:

1. The butt joint is very simple to make and you start by measuring out the lengths you want your timber to be and then using a try square mark a straight line across the timber where you are going to cut it.
2. Now cut your timber at the line you have marked and repeat steps 1 and 2 on your next piece of timber. You can either use a hand saw such as a tenon saw to cut your timber or you can use a drop saw. If you are securing the joint together with pieces of dowel drill the holes accurately now before you begin step 4.
3. Secure your first piece of timber in a vice or to the side of a bench with clamps but keep the top flush with the rest of the bench.
4. Apply some glue to the top of the secured timber and then place your next piece of timber directly over your first piece making sure to line up the edges. Now clamp up the joint or hammer in some nails or add some screws.
5. Now check to see if you’re joint is square and leave it to dry. If you are putting nails or screws in the joint check it is square before you use them.
6. Optional: You can strengthen your butt joint by securing a square or triangular block of wood to the inside of the joint which also helps to prevent movement.

 
Hope this helps! Do not hesitate to check 1001pallets wood joints article, it’s a great place to start!