Tutoring is a two way street. Both sides of the party need to put in 110% of effort in order to see positive results.
A tutor needs to be enthusiastic about the subject. They need to be passionate about what they are teaching. Throughout my college career, I had a better experience and better results in classes where my professor was enthusiastic about the class. Adversely, teachers who don't show enthusiasm, do not connect with the students, and the students refuse to create that connection as well.
Another healthy tutoring tip is patience. Nobody likes a pushy tutor! Yes, be assertive, but being too pushy will annoy the student. Patience allows the student to digest the material and to create cognitive connections.
Positive encouragement is also a good way to make lessons fun. There are teachers who scare their students by giving them discouragement. When a teacher gives the student positive encouragement, the student feels good about themselves, and not intimidated.
Furthermore, being prepared is a good way to make lessons fun. Lessons are very dull and boring whenever the teacher is not prepared to teach the material. When a student sees that the teacher knows what they are talking about, the student feels good about themselves that they are in trusting hands. Trust is very important. If a tutor is not trusted, progress will be difficult.
Lastly, exposing students with visual material will help them connect better with the information. Some people are visual learners. Just like picture books are fun, so are class lessons with pictures!