This is the 712th most frequent Latvian word.
domāt
"Domāt" means "to think" in English.
Here, 'domāju' (the form of 'domāt' used) indicates a process of reflecting or considering about something.
Es domāju par rītdienu.
I am thinking about tomorrow.
In this context, 'jādomā' (from 'domāt') expresses a necessity to contemplate or focus one's mind on something.
Man ir jādomā par savu nākamo uzdevumu.
I need to think about my next task.
The form 'domājiet' (a command or polite request form of 'domāt') is used here to issue a recommendation or suggestion for consideration.