Mails I need to answer
`in:inbox and !from:yourmailaccount@gmail.com and !from:yoursecondemailaccount@gmail.com and !in:saved`

Mails I need to answer for a while
`in:inbox and !from:yourmailaccount@gmail.com and !from:yoursecondemailaccount@gmail.com and before:2017/04/01`

Saved links yet to read for a while
`in:saved and in:inbox and before:2017/01/01`

Saved links yet to read
`in:saved and in:inbox`