So if you're as young as I am 
, you could probably remember the "happy meal toys" you would get in McDonald's Happy meals. I remember those all to well. The sad part would always happen when I waited to long to get one of the toys that was part of a series and it was no longer available... So I don't want to scare anyone, but you should consider yourself warned because Microsoft is at it again.
Microsoft is really wanting everyone to move people into SharePoint 2013, SharePoint 2016 and Office 365 as soon as possible. Well not really as soon as possible, but more like sooner rather than later. They are ending "Mainstream Standard Support" for SharePoint 2010 on October 13, which just so happens to be a Tuesday and not a Friday 
. https://support.microsoft.com/en-us/lifecycle?p1=14944
What does this mean for you?
While you don't have to abandon ship immediately if you haven't already started planning your migration off of SharePoint 2010, but I would start soon if I were in your shoes. The last thing you would want is to run into an issue with SharePoint that you can't resolve internally and you can't call Microsoft to help because you're on an older version. So what should you do?
As someone that has worked with over 30 migrations, I've seen the good, the bad, and the ugly. Here are two key things I would recommend for anyone still using SharePoint 2010.
1. Review your processes: Take the time to review your process. A lot of things have changed since 2010 was released and I'm not talking about SharePoint. I'm talking about how people work today. There's no point in migrating broken processes, processes that are old and stale or content that just is't useful anymore. Also with the cost of storage, drive space cost going up and user productivity needing to increase, re-evaluation is good. So start off on the right foot, and at least evaluate what you have now, before you move it over to a new SharePoint version. No need in helping clutter a new platform if you don't have to. I would also recommend the following to help you when using Nintex:
- Workflow Analyzer - Workflow Analyzer - Stable thanks to Aaron Labiosa
The Workflow Analyzer is a project that has been worked on internally for quite a while. We find it quite useful and think you will as well. This tool will allow you to view workflows outside of a SharePoint environment as well as a few other tricks.
- Know your workflow program - Know Your Workflow
It's a cool script we’ve built to help you inventory and measure all workflows across your environment.
NWAdmin is a command line tool that ships with Nintex Workflow 2010. It is used to perform various administration operations.
2. Plan your migration approach: Migrations can be boring, scary, or down right frightening for your users, so figure out your options. Find a Nintex Partner that can help you with this and they can make your life a whole lot easier. Another thought for that, and one that I would recommend because I've personally used them is Sharegate. Sharegate's migration tool can be used to migrate SharePoint content and Nintex workflows from 2010 to 2013 and 2016 when its released. Their product is easy to use, works great with Nintex Workflow and Forms, and its easy to use! Be sure to get the correct product version that includes the Nintex functionality if you use them.
Migrations don't have to be the horror story of IT. There are a lot of guides, documents and help out there; so don't be shy, ask for help. No point in running into issues that someone else has already resolved. Also I would check out the SharePoint Community . There are tons of people out there that can help with SharePoint related issues and may have done what you are attempting already.
So with that, I will end my warning for SharePoint 2010 End of Life. If you are still needing to migrate off SharePoint 2010, be sure to plan things out, don't rush and get help if needed. It may be worth while to explore migrating either directly to SharePoint 2016 or going to Office 365.
Enjoy.....
