pretty much you gotta be careful with inverts and big jumps, but you can minimize the risk by being smart about it
sure, there are times when you need to just sack up and do it, but then theres also times when you need to back off
if your not feeling it, don't go for it
if your feeling it, go for it
trust your judgement
and work your way up. Like if you can do 5s, then go for the 7 but don't try a cork 10 if you only land 5s because thats how you can get hurt
visualize all the time, watch videos, talk to those who can do the trick, feel the jump, go for it on a nice soft day
and once you land a trick, keep doing it, don't stop. It takes a gazillion times to get the muscle memory for a trick correct. You will forget how to do it the next day. Like lets say you land a 7. Keep doing the 7 every run. Don't go back to 360s or straight airs or work on something else. Keep doing the trick to remember it
and good luck, don't push yourself past your boundaries too much