I have 10 years work experience in GRAPHIC DESIGN Field and this GIG for customers that who have issues with final print files.Here are the things I can make you to look like the design more professional before it gets print..
a) Document sized improperly.
b) Colors set to RGB instead of CMYK.
c) Spot colors not properly defined.
d) Not allowing ample margins (putting information or borders closer than 1/4” from any trimmed edge).
e) Resolution not high enough (should be minimum 300 dpi at 100% size).
f) Bleeds not set up correctly (artwork should extend at least 1/8” past crop marks).
g) Crop marks missing or incorrectly placed.
h) Missing fonts or images.
i) Poor contrast between text and background.
j)Spelling and grammar errors.
I can FIX these ERRORS in your file and will give you a better print ready file GURANTEED!!