Here are the steps to make a countertop:

1. Remove your old countertop.
2. Measure the counter with a measuring tape once it is removed.
3. Decide what wood you would like to use.
4. Measure and mark your wood.
5. Sand your countertops with medium-grit sandpaper, if you want to remove imperfections.
6. Glue your wood pieces together with a very strong wood glue.
7. Clamp the wood together and let it dry for 24 hours.
8. Sand the countertop again with fine-grit sandpaper.
9. Apply a finish of your choice.

I hope this helps! Let me know if you have any other questions or if there's anything else I can help you with.