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.
Volunteering and trying out different career experiences is essential to knowing what you like/what you are good at. I often volunteer my time to entomological societies or writing blog posts for the public so I can gain more skills in scientific communication. Practicing your skills is what helps build them up.
I have found success in graduate studies by having a solid group of people supporting me. Academia can be daunting and difficult, but having friends and colleagues who are like-minded, engaged, and generally supportive has made my journey possible. Pick your department and supervisor with care, seize opportunities, explore new and old interests, maintain hobbies outside of research, and most of all: stay curious.
Think hard and explore the options of different pathways you can take in graduate studies. Make the best out of grad school, be social and go to events to meet others in your program. Enjoy your time here, it goes by extremely fast.
Be prepared. Look around first and then come here. Do your homework when you're looking at programs and remember that you stand a real chance of working with OMAFRA and OMAFRA connected researchers here. They really are the best.
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.
Find what interests you. Many other grad students are much younger than I am and will be entering a life's career following completion of their studies. Looking back, I think it's important to pursue your passion and let the career, money, etc., come from that. During studies, stay on top of things. At the same time, don't neglect other outlets, pursuits, interests: things have a way of connecting in unexpected ways.