How do I to a clean install on my X but transfer my sms and email history?

[iMore Question]

I am assuming when I boot my new iphone x tomorrow I will be asked to restore from backup or new install. I am for the first time going to do a clean install I hear its a good thing to do from time to time. I get a new iphone every year since iphone 4s and always restore from backup. I have alot of archive conversations I look back to from time to time. also how would I restore my contacts?