1.
Organise your time. How long until its due? How long are you likely to need on it? Between now and the due date, block out some of your non-timetabled hours to work on the assignment so you aren't tempted (as it is common to be!) to get distracted or put it off.
2.
Create an essay plan and organise your references - where will they go in your essay? How will they back up the points you want to make? Are there any alternative interpretations out there and what could this mean? Once you have a plan it will make writing the body more easy! P.S. please ask your lecturers if they are permitted/would be willing to check essay plans if you are worried if you've included the right kind of material (as I was many, many times! 🙂 )
3.
Yes, ask for help. You are not expected to know all the answers. If you are struggling, use your lecturers. They're there to support you and its in their interest for you to do well and enjoy your course. Go to their office hours, ask for suggested reading/directions for essays, what they like to see when marking.