This is a really good way to dive into specific categories and explore the projects that made it to this year's ISEF. What I would do is start with what immediately interests you for now... and pick up some tips.
You might get ideas for areas/topics to research. You might see creative methods used in various studies. Pay particular attention to the fact that some utilize equipment only available at a university or corporate lab, but... many also feature creative methods done by students at home or in school labs as well!
Once you get inside projects that you get ideas from, feel free to save them in Diigo for later, or share really interesting ones with others you think might benefit from seeing it.
I added this one, which includes detail of an environmental study, to illustrate how creative use of everyday materials can sometimes work to design scientific methods that work!
District Instruction Coordinator.
Marine Biology instructor.
Husband.
Dad.
(certainly not in order of importance)
North Kansas City School District,
Missouri, USA