Marketing.....
Does the coach know you? If he does, then make sure he know how much you want to make the team. A quick well placed, "Hey Coach, worked really hard on my game this summer, I'm really hopeful of makeing this team. Take an extra look at my defense, I've worked on improving my lateral movement..." Something to this effect. Make sure you stress something that coach would like to hear. Usually it's defense, but if you have a rep for being a poor shooter, empasize that you took 500 shots a day.
If the coach doesn't know you, not a bad idea to, after practice, say hello, tell him who you are, your experience, what you do well, how you feel that you can help the team, and make sure you let him know that your number one goal is to make the team. If you are having a good conversation with him, also ask him what are you looking for in a rookie player, and then let him know that you can do what ever he asks. You could also add that if it is a decision between you and another player, you can guarantee him that your attitude and hustle will be 110% all year long.
As a coach, when you walk into a gym with 50 players, it's hard to pick out the bottom 4 guys of a team. This approach will get you a fair look. It will ensure that you won't fall between the cracks. And it works 1000% better then having your Mom or Dad come and whine for you. That is almost a sure way to get cut in my program. I want motivated players, not motivated parents....