Re: 1 on 1 tactics
1 on 1 is probably my favorite basketball match up by a good margin...
If you play a lot of it like people have said here you'll develop a really good mid-range jumper.
The most important skill you'll get though is defense. 1 on 1 is great practice for defense. Even if the guy can't shoot get as close as you can, stay on the balls of your feet and stay with him. Use your hands to disrupt his dribbling to slow down his drive, and use your feet to catch up and stay with him.
This BURNS through your stamina, since you have to play offense after this as well, but 1 on 1 is how you become an EXPLOSIVE defender, and that's not something a lot of people can do.
Also, lapses in concentration will cost you many points, so it's a good way to practice that also.
Go for the moves that you've practiced, trust your own skill-set, and try to make the best decision you can at every turn... All of these things will not only help you win 1 on 1 games but will help you become way better in any game of basketball.