Pretty simple.
1. Determine broadhead / head weight you plan to use.
2. Get the bow draw weight verified at your draw length - Note draw length too.
3. Determine what weight of arrow you want to shoot. I like 10 to 11 gpp.
3. Verify with bowyer what type of string material you are using and what string count.
4. Verify with bowyer if the bow is center cut, or if out of center how far.
5. Decide on Carbon, Aluminum, or wood.
6. Do not listen to anyone in a compound shop on arrows - call a sponsor here who sells arrows.
8. Provide info to sponsor on bow, type, drawlength, head weight, etc....
7. Listen closely to what the sponsor says and follow their directions closely.
Done - great arrows and little to no headache.