I agree with the above and would add to make sure each hub is approximately 500 - 1500 words and contains pictures (your own are best) and uploaded video content that is relevant to the hubs. Multimedia is great for traffic. You need to add hyperlinks, only one or two, and then get the hubs cached. An easy way to do this when you start is to email the hubs "linktothispage" to a friend with instructions for them to click on and read the hub. Vote it up etc. It is not a full on cheat and if you use it only ask one or two friends, but this does speed up the cache when you are a newbie.
Once you have about five hubs of good quality and fine grammar, plus all the tricks above, you should get Adsense approved.
The final factor involved is to ensure you are uploading regularly while you wait for approval. Then read some good hubs on making sure you have done all the steps to get Adsense working.