Some of the best advice I ever received for getting a job is as follows in numbered format.
1. Have you shaved today? If not, shave.
2. Is your shirt clean? If not, clean it.
3. Is your shirt a band shirt? If yes, burn it.
4. Do you jeans have holes in the cheeks? If yes, get new ones.
5. Do you smell like an animal? If yes, clean your ass.
6. Do you have confidence? If yes, keep it.
7. Do you have arrogance? If yes, tone it down.
8. Can you learn? If yes, keep learning.
9. Can you answer a question? If yes, always wait for it to be asked.
Hopefully you can see the idea behind this, I could go on but having confidence and looking well kept goes quite a long way.