[boost] preparation for Gsoc 2017

Hello Boost community, I need some help for preparing effectively for Gsoc 17 with Boost community. I have been through the boost gsoc webpage and for getting selected in Gsoc an aspirant need to provide competency Test. I want to know that apart from competency test what other projects would be helpful in making my proposal strong. Should I be writting more programs using boost library ? , should I be aware of all boost libraries ?. I want your suggestions as I'm very serious regarding the matter. thanks!! and sorry if the question is quite nooby.