You know what you want to do, and have become highly skilled at doing so in an efficient manner.
Whenever you use a bonus action for any purpose that does not involve an attack roll or cause a creature to make a saving throw, you may use your reaction to perform a second bonus action. This second bonus action may not be used to take the same bonus action as the first one, but may be used for something involving an attack roll or saving throw if you have a relevant bonus action. This feat can not be used to cast more than 1 non-cantrip spell per turn.
Additionally you may take the use an object action as a bonus action, provided you have sufficient hand(s) free to use the object.