Choose a supervisor who makes you excited about your project. There will be times when your project does not go as planned and reminders of that enthusiasm and why you are doing the work are crucial to continuing through the hurtles.
Although I think most prospective grad students have been told about the importance of picking a study/project that interests you, I think it's also really important to take some time to see how you interact with your supervisor and lab. These will be the people you work the closest with for the next several years, and help provide support to you in some of your toughest moments.
My research dealt with using biostimulants as environmentally friendly alternatives to fungicides, for preventing dollar spot disease, which is one of the most prevalent disease that affects turfgrass on golf courses worldwide. My research will hopefully help to identify species and cultivars of turfgrass that respond positively to various biostimulant applications and therefore have a lower disease incidence. This will potentially allow golf course managers to use fewer fungicides in the future by switching to biostimulant applications, which will reduce the environmental impact that they have on the surrounding ecosystems.
As a graduate student it is important to be flexible and adaptable to change as you work through your degree. Becoming a graduate student allows you to develop your professional brand, while contributing to academic literature.
Grad school is demanding, but it's also an incredible opportunity for intellectual growth and discovery. Be prepared to work hard, face setbacks, and constantly learn. Find your passion. A strong foundation in your area of interest will fuel your motivation throughout the programme. Seek guidance, embrace the journey, and remember that your path is unique.
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.