be sure to do something
be sure to (do something)
To make a conscious effort to do something. Typically used as an imperative. Be sure to pick up a shovel before this weekend's snow storm. I know the door is locked because I was sure to double check it before I left.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
be sure to do something(also be sure and do something spoken) used to tell somebody to do something: Be sure to give your family my regards. ♢ Be sure and call me tomorrow.
Farlex Partner Idioms Dictionary © Farlex 2017