Productive day?

I woke up at 9 am, which is okay, but when I got out of bed it was 10:30. I took a lesson and taught a couple of classes, and then right now landed in library at 4pm. Today I'm thinking about the song "病気が治ったら" from the band HASAMI group in 2011. 

https://www.youtube.com/watch?v=CQ-DZfQhXcc

Below, you can find things to do, which I, not you, will do here in library from now.

・check the professor's comment on our questionnaire and modify it 

・elaborate ideas of chocolate thing

・finish coding challenge to make a photo site  

It looks like I should start with two or three basic pricing tiers. I even think that the business should start with just e-commerce web page selling international chocolate bars and gifts. To start a subscription service, I will have to have a huge amount of chocolate each month that I'm not sure will sell out. 

Anyways, I just realized I don't really understand the definition and usage of em and rem. I will revise it when I get home.