Like everyone is saying, YOUTUBE!!! This will get ideas flowing. If you prefer a type of dance (lyrical versus swing versus hip-hop...) make sure you get music that fits that style that is 1. unique, 2. not overplayed, 3. fast or slow to your liking (if you have no endurance, it's not fun doing a fast routine for 2-3 seasons), 4. something you like, and 5. it describes you and you can dance to it.
Many people forget magazines. They have great photographers that capture cool dance poses in routines. Take a look through ALL of the magazines you have and post-it cool poses. If you don't want to do exactly what they are doing, tweak it a little bit to make it your own. Pictures will be especially helpful for beam.
FLOOR: Make sure your dance goes with the music. Make sure to put a tumbling pass and then a leap or jump and then mix it up, so it is not quite as predictable. Make sure you have parts to sell to the crowd, to catch your breathe, and to have fun. If you run out of ideas, don't just walk into the corner and do something with your arms, people can tell you ran out of ideas. Do something on the floor and something on your knee...change your level occasionally throughout the routine. Not only do poses and steps with your arms OR your feet, incorporate both. Don't make it all poses. A posey routine is not fun. Dance, flow, try steps, have one move go into the next and the next... Don't forget to have an original move (like something flexible on the ground or an interesting pose)! Like someone said, go to the Code of Points. Have a good time and don't forget ARTISTRY and PERSONALITY!!! *don't do anything you are uncomfortable doing or feel stupid doing, people can tell and it looks bad.
BEAM: Think of your beam routine in parts. Parts where you are: hop, hop, pose or fast fast slow or down up flow or low step high step sharp or arm head flick or kick up down... I think you get the picture. Make sure the poses are original and that you change levels occasionally. Look at OLD VIDEOS. These will help you so much (there was more artistry). Make sure to do something creative that only you do. Don't forget to have it fit your style. If you can't think of anything, pay a proffessional dance or gymnastics choreographer, tell them your likes and dislikes, what you are and aren't comfortable with, what you like and what you don't, what your signature move is, when you want breathing time, etc.
I HOPE THIS HELPED YOU!