Pursue research that you are passionate about and that inspires you. Graduate studies are a lot of work and can be difficult, and if you're not passionate about your research then you probably won't enjoy it. That being said, don't be afraid to step out of your comfort zone and experience new things, whether that be academically or personally. Also, don't be afraid to get involved, some of my greatest experiences at the University of Guelph have been outside of the classroom.
Graduate Studies is nothing like your undergraduate, it is one hundred times better. However, you must make sure that you choose a topic that you are interested in for your MRP (Major Research Paper) or Thesis. If you do, it will be a great experience. The biggest lessons you will learn will not be in the classrooms, but from your seminar sessions with your own students, one on ones with your professors and advisors but mostly from the people in your cohort. It is a lot of work, but it worth every minute.
Drawing on my experience in academia and research, I would advise prospective graduate students to embrace challenges. When confronted with a difficult situation, tackle it directly rather than trying to avoid it. You'll often find that the solution emerges as you delve into understanding and addressing the challenge at hand.
Do not be afraid to engage with your professors and fellow students. Professors want to help you succeed so do not be afraid to reach out to them. The people who best know what you are going through are you fellow students. Ask how they are doing, ask if they have any tips for the upcoming assignment. Doing this will help make you a part of the LANG community.
In graduate studies, you will work harder than you have ever worked, but it is going to be so rewarding. There are experts in every field at the University of Guelph, who will support you and offer so many resources that are available to help you succeed. You are also going to meet some incredible people along the way, especially since there is such strong comradery among fellow graduate students. I know this is a cliché, but I think you get out of your time here what you put into it, and there are so many opportunities available to take advantage of, to ensure you have a great experience.
Sometimes as an undergrad it's easy to stay 'behind the scenes' and just go to classes and complete what's required of you. But grad school has SO much to offer, and there are opportunities to gain new experiences around every corner that contribute to both personal growth and look great on a CV. I think getting involved is so important, and creating new relationships with faculty/other students is key.
A right step taken at a right time completely changes your identity. I won't say that your academic journey will be easy, but I am sure it will be worthy.