Get involved in the community. Grad school is more than your research project; expand your contributions beyond your field of research and into the community where you are working.
I would encourage all prospective graduate students to research their program of interest and speak directly to faculty prior to applying as this can ensure that your research goals align with your prospective advisor/program of choice.
Explore as many different topics and opportunities as you can, talk to lots of different people (who are interested in the same things, and different things!), and don't be afraid to ask for help to find the resources and supports that will help you succeed in what you want to do. When you're choosing an advisor, make sure that they will be able to provide you with the support and mentorship that you want and need, and that you are on the same page about academic and work expectations.
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.
When an airline asks you to sign a waiver for your guitar just scribble quickly in hard to read handwriting "no thank you" and hand it back. Later if they damage your equipment you can claim you did not understand why they handed that waiver to you.
My advice would be that a Masters degree is like a roller coaster. You will have your ups and downs in your research but that is all apart of being a scientist! There is no such thing as a 'bad' discovery.
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.