My first piece advice to prospective grad students would be to find a lab or an advisor that you mesh well with and are excited about working with. If you are on the same page and feel comfortable from the start, it makes all the difference. After that, trust yourself and your abilities! You are capable of more than you think.
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!
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.
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.
I am a proud second-generation Gryphon and University of Guelph alumna, having received an Honours Bachelor of Arts in International Development from the U of G in 2008, following in my father's footsteps (Agricultural Engineering '71 and MSc '86). Coming back to Guelph to pursue a doctorate has felt like coming home in all the best ways.
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.