Time management

After this week there are less than 6 weeks left and I have only fully finished one main brief and 2 small briefs. How I am going to organise my time

Brief 2 leeds.... half a week to a week

Brief 3....I now have my ideas I just need to do the work, 2 weeks tops, I am hoping less.

Brief 4 know what brief I am doing I just need to start, 3 plus weeks

Presentation boards 1 week.