My day I guess (also please give me studying advice, I need it)

Today I've been helping my grandma make food for My Castle's rotary club. I haven't really had a lot to do, but I've been standing almost all day so my bones hurt :( I've walked around listening to music, but I've also been kind of stressed out because I have my FBLA Nationals test in like two weeks and I still don't know how to study (You might ask, how can you not know how to study? My answer is I've never really needed to, but I need to now since FBLA advisers really want me to do well). How I've been studying is going onto quizlet and looking up my event (Marketing Concepts test) and looking at the flash cards and/or reading the study guides, but I don't feel like it's helping me retain the information. So if you have study tips, please help a girl out!