cover all the bases

phrase

variants or less commonly cover every base or have (all) one's bases covered

: to do or include everything that needs to be done or included : to fulfill all requirements or necessities

The well rounded menu covers all the bases—pork or duck breast and always a grilled chicken with complementary sauces and relishes …

—Caroline Bates

In other words, we need to cover every base. Too often, something is remembered at the last minute and we find ourselves waiting for the stores to open on sale day so we can purchase a much-needed item.

—Sue Story

In your e-mail, let the company know that, for their convenience, you're e-mailing the resume and letter, but that the original documents will arrive by postal service. This way you've got all your bases covered.

—Peter Post