Great tips, here's a few others.
1. Not being quiet while moving around. By quiet I mean choosing steps to avoid noise. This isn't to avoid spooking birds so much but being able to hear a bird gobble and not covering up his call with leaf crunching.
2. Looking with your eyes when a bird is approaching out of sight. By this consciously scanning by only shifting your eyes left and right and not allowing your head to turn at all. It's inevitable if you turn left the bird will pop out to the right.
3. Shut up and put your calls in your vest. I rarely and I mean rarely wander around looking to strike a bird by calling. I do a lot of sitting silent waiting for a bird to free gobble. Wandering and calling spooks tons of silent birds and is unnatural, hens don't walk around constantly calling. If a bird is workable they inevitably will gobble on their own. You may have to sit quiet for a while but trust me he will gobble at some point.
4. This goes to number 3, and is the deadliest thing I do imo. If a bird free gobbles, move some distance towards them but not too close, stop and wait for the next gobble which will come, when he does slide ever closer. Rinse and repeat using his gobbles to get as close as you can before making the first peep. This tactic is lethal as the first time he hears you you are in his pocket. If you do this 90% of these birds die.
5. Leave your locators at home, no matter how good you think you sound you don't. If it's a conducive gobbling day there's plenty of triggers to make a bird gobble naturally,
6. What ever happens your mindset should be to back out rather than spook a bird, spooking birds is the number one goal of not to do on my hunts. I'd rather play it safe and not spook birds on a Monday so I can come back Tuesday with intel and try again.
7. Don't take ahh ****** it shots. We've all done it and it's always a bad idea. If it isn't a sure kill keep your safety on, there's always another day.
8. Walk, don't be a lazy ***** and ride your atv all over. It's spring, the weather is nice and your fat ***** needs to exercise. Haha