That's great!

I've added a few corrections below. If I've used this (underlined something), I've left out a word. If I've highlighted it, I've corrected your spelling. You could work on shortening your sentences or using different connectors in the place of 'and'.

But well done :)

My day

Today I'm so busy. There are so many things to do at work, and after that I must go to college. My routine is very hard, and some days I'm very tired.
I also need to do my english homework - I don't know if I'll have time to do it. I need to write about globalization, and I have no idea what I'll write.

My day

Today I'm so busy, there are so many things to do at work, and after that I must go to the college. This routine is very hard and on some days I'm very tired.
I also need to do my English homework. I don't know if I'll have time to do this. I need to write about the globalization and I have no idea what I'll write.

My Day 

Today, I'm so busy. There are so many things to do at work, and after that, I must go to the my college classes. This routine is very hard routine and in some days, I'm very tired. I also need to do my English homework, and I don't know if I'll have the time hereto do this. I need to write about the globalization, and I have no ideia idea what I'll to write.