Break up your assignment work into steps.
Get more information here:
Try brainstorming your topic.
Use pen and paper and create your own, or try an online tool.
You could do this with your friends in a group.
Some people find it useful to make a mind map or concept map like the one below.
concept_map_lrg, 2008, by jean-louis Zimmermann. (Licensed under Creative Commons Attribution 2.0 Generic)