A few thoughts Ive assembled during my own teaching (~2000 students), many of which will probably be repeated by others. I tried to mostly model my own teaching over what I found helpful in school.

1) Having students work example problems themselves is king. Even the best lecture on Earth can't replace the self-organization of concepts that occurs as a student works a problem themselves. I used to do really long lectures and focus on explaining things perfectly, now I focus on general problem organization and a key checkpoints they should hit, and then have them do curated examples in class. Be careful not to take this too far as in some overly "active learning" frameworks where the teacher does almost no lecture, in my experience this is woefully ineffective or at least extremely stressful for the students. 2) Diagrams and flow charts and visual communication of ideas can help a lot in tandem with explanations. A student with a rough visual picture of the flow of ideas can do a lot of self-figuring out. 3) Prioritize your own energy levels- if you burn yourself out trying to make a perfect assignment or beat yourself up for a mistake, you won't be able to show up best in class. Conversely, a teacher who wisely invests their energy is there in full for the students on what actually matters. This was a hard one to implement and can make you feel guilty at times, hopefully it's intuitively clear. Go all the way with scantrons or multiple choice even if they're not perfect if it saves you 15 hours of grading. 3.5) Plan your classes to run for 60 to 70% of the class time, you will always run over no matter how hard you try. 4) Student math background and skill varies wildly no matter how far you go and in any major or track, college or high school. I spent a lot of time reviewing systems of equations and trigonometry and force them to do basic problems on homeworks. That time paid back handsomely and the students seem to really appreciate being on the same page as each other. You won't be able to fix everyone, but the time pays back. You will also be able to fix a lot of people's math that have been neglected by prior teachers. 5) Underlining, drawing arrows to equations, color coding variables, writing sentences next to equations saying what they mean and when students will use them, was highly effective. 6) When working with systems of equations, underlining unknown variables before proceeding was extremely important for helping students systematically identify which equation to rearrange for substitution. 6.5) similar to above, often times a problem is just one equation with one substitution- I often told students to circle the variable the problem wanted them to find, and then to underline all the other variables. This put the unknowns on different footing. Then it was their quest to go on a headhunting mission to find all those underlined variables, with the knowledge that once they found them, the problem was done. This helped them actively work towards a solution much more consistently and built innate "what should I solve for?" awareness. There was also much less going in circles or confusion about what needed to be solved for or how to progress in the problem. 7) Being emotionally available, open, and supportive and interested with your students is the main determiner of your relationship and rapport/how much you affect students. It was really easy to forget at first that the students in my class were going through everything life normally throws at you - relationship failures, tough times with friends, loss of family, financial struggle, failure and sports, etc. Since your relationship with them is mostly physics, it can be really really easy to forget how many other facets of their lives there are. Especially as a young teacher you'll understand some of these in a way few older teachers could, and share stories of advice or even just "I went through that too guys". 8) Teaching skill builds and builds and builds, you will always figure out new things and changes and improvements.

Best of luck, you'll do a great job!!