When filming your flourishes make you sure you film them from different angles. For example you can set your camera up right in front of you and then you do all of your flourishes. Then you move the camera a bit (slightly angled to the side for example) and then you just repeat doing all of your flourishes. That way you can play around with the angles in the editing/post later on.
When you use music in your videos make sure you time your cuts in the edit with the music. Make sure your cuts always sit on a nice beat in your music track (have a look at the waveform of your music).
If you already know what music you wanna use, you can listen to it while you're filming your flourishes, helps with the flow of your moves.
Don't overdo the color correction. Just make it highlight your cards a bit. You can use some filmgrain and letter boxes if you want to go for a more cinematic look.
hope that helps a bit
regards,
Joey