I think that the tool MATCHPROP is one that is easily forgotten or goes unnoticed. Yet is will save you a ton time.
It works like the “format painter” that is found in Microsoft Office products for those who know that tool.
Let’s face it, we all draw objects and forget to create them on their respective layer. This tool will save you the hasel of remembering what layer an object is on or if there were any changes to color, linetype or lineweight that may have been changed to something other than  “bylayer”…

• Enter the command MATCHPROP
  or on the far right of the home tab/ribbon, click the MATCHPROP button
• Select an object in the drawing that has the properties that you want to copy to other objects
• Select the objects that you want to take on those properties