If you have an iPhone, get the app "Practice+" Its great. Helps with tuning and stuff. Practice intonation. Some notes come out flat on certain instruments. Remember your sound is effected by ambusher, and if the instrument is cold or not. All of these effect how your instrument sounds. Just get a playing book or look up some fingering charts/ scales next to each other. Repetition and practice makes perfect. Remember to try to do the chromatic scale by the end.
Oh, and don't forget to listen to swing music to help you feel the beat and all better :)