Some useful LyX tips….

For removing the date from the lyx article..

use;

\date{}
 
For more clear font appearance in PDF

\usepackage{pslatex}
 
For adding degree symbol acceptable in LyX as well as LaTex

\usepackage{siunitx} %% for using degree symbol

\ang{90} = 90degree

\si{\degree} gives the degree symbol