Absolutely take the time to reach out to current students, alumni, and faculty members affiliated with the grad programs of consideration. Your grad school experience will very much be influenced by the people you are surrounded by during your education and the culture of the program. Hearing from other's experiences and talking to current students is one of the best ways to find the right fit for you.
To future graduate students, it is important to keep a clean, legible, and logical lab notebook! Also remember that your brain is your best weapon to succeed in graduate school and it functions best when it is well-rested; only pull all-nighters if necessary. Learn to manage your time and try not to do multiple things at once; multi-tasking in the lab can lead to errors in experiments. Finally, enjoy your time and get all the food and freebies from conferences and other events!
If you are considering graduate studies, I suggest that you take your research interests and see who on campus is pursuing something that aligns with them. Given the wide range of topics and fields of study here, I would not be surprised to see at least one other individual or faculty member engaged in some research that closely mirrors the interests of the student.
Always ask for help. When in doubt, ask; When not in doubt, ask. Enrolment in graduate courses can be very small, and grad life can sometimes feel isolating; so, try to form great bonds with other grad students. You have a lot in common! Try to take some time off to have fun, and when you inevitably encounter students pulling a tractor in September, do the opposite of what I did; and be cool! If you can, participate in the 3-minute thesis competition (3MT); it's a lot of fun!
I've been very privileged and lucky since coming to Guelph for my undergraduate degree back in 2010 as all of the opportunities I have been given have been gained through building strong relationships with faculty and staff on campus and finding mentors that have helped guide me along my career path. I've always found that the people on campus are incredibly giving and willing to devote their time to help out students. I've also found that simply starting with expressing an interest to be more involved and showing initiative can go a very long way to opening doors to new opportunities.
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.
Remember that research never goes as planned and to not let failed experiments or unwanted results keep you from working hard on your degree. No one gets through graduate school without failed experiments and huge changes in their project plans.
Try your best to reach out to faculty and make connections with people who share the same passions as you. Everyone at the University of Guelph is happy to share their expertise and provide guidance, and those connections are very valuable in expanding your knowledge and reaching your goals.