Looking or guidance to Migrate from SharePoint 2010 to SharePoint 2016

In my experience making use of third-party products to make a good inventory and ultimately perform content migration works best. Several vendors exist providing products that can be of great use in such projects. ShareGate and Metalogix are big players here and provide great guidance, videos and blogs on their websites. 

https://en.share-gate.com

https://www.metalogix.com

If there's room (budget / time), it's always good to reconsider your customizations and modify them to comply with the lates guidance. For some customizations it will be technically required to re-create them, for others it might be a good choice to modify them for example to make future upgrades or a potential move to O365 easier.

Hope this helps!