We just went live last month (5/2019).  A few lessons learned would be:

- test...test...test - we thought we did a lot of testing but it wasn't even close to enough.

-Try to back fill positions or in the very least extend your timeline to allow people to work on Sage and their other work

-Make notes - We had so many times that a consultant would make and change and a month or two later no one on the core team could remember why we made the change.

-Hold your team accountable.  I was the PM on our team and it was my first time.  Everyone kept saying they had done a ERP implementation before so i didn't press anyone when it came to issues or deadlines.  Just because they have done something like this before doesn't mean they know what they are doing.

-Lastly- have a clear path of where you are going.  So many times we skipped a core meeting because people were busy and we then couldn't remember what we were supposed to be doing.

I hope this helps and is what you are looking for.  I wish you the best of luck!

We just went live last month (5/2019).  A few lessons learned would be:

- test...test...test - we thought we did a lot of testing but it wasn't even close to enough.

-Try to back fill positions or in the very least extend your timeline to allow people to work on Sage and their other work

-Make notes - We had so many times that a consultant would make and change and a month or two later no one on the core team could remember why we made the change.

-Hold your team accountable.  I was the PM on our team and it was my first time.  Everyone kept saying they had done a ERP implementation before so i didn't press anyone when it came to issues or deadlines.  Just because they have done something like this before doesn't mean they know what they are doing.

-Lastly- have a clear path of where you are going.  So many times we skipped a core meeting because people were busy and we then couldn't remember what we were supposed to be doing.

I hope this helps and is what you are looking for.  I wish you the best of luck!