When your 1st game, try not to play very fast bpm songs. Alot of players believe that 1st game must play 180~ bpm songs for warm up, but it is not true. If you play very fast bpm in your 1st game, later on you will feel your fingers get tired easily. Recommended -> 120~140 for 1st game.
Memorise the 1st 4keys, if you can memorise all the 1st 4key you will found out that actually all the other keys are the same.
Try to chance even you can't. Alot of players gave up when they can't chance, it is a wrong choice! When you try, you will learn the pattern of the chance and it makes chancing easiler.
Buy a better computer with good graphic card. Good graphic card will help you get more perfects and lesser lag.
If you want to get more perfects, keep on train chaining songs, later on you will found out that chaining is very easy on all songs as the perfect point is always at the same place.
If you want to play faster song, Example: 170, but you can't, try around 160 or 155. After one week, try 170. You will found out that you have improve alot.
If you want to become stronger in 8keys, it is recommend that you play beat up, use 1hand for beat up(arrows) 1hand for (space) as it will help you in 8keys.
Buy a good keyboard. Expensive keyboard will have faster reaction time, try to use ctrl as ctrl is easiler to get perfect (for myself) some might not work.
Do not be sore losers, Example: Player A won, Player B lost.
Player B: (All kinds of vulgarites #*@#*!@&) Why you win!!
Player A: ...
The reason why not to be sore loser: Do you see professional being a sore loser? NO! A real professional, even when they lose, they won't sore. This is the most important part in EVERY GAME, not just Audition. ^^ When you lose, just think that, they work harder than me, that's why they are stronger.
Find professional players to challenge yourself. Don't bully nubs, as you won't improve much. It might look cool when you win nubs, but when you really challenge professional players, you will find yourself that, you are just a little worm in their eyes. Do not fear lose! A loser will never be a always loser!
Lastly, the most important point, DO NOT play for too many hours! Some players thought that, the longer they play, they get stronger. It is totally WRONG!
Insuffient of sleep of will lead to getting more cools, bad, miss. What is worst, the hours you have been training is totally a waste of time, as you did not use your full potential to play, so you won't improve much. So why not, sleep more and play with your full potential. ^^