The web has been around for over 20 years, and software design for even longer. Chances are, somebody has solved your interface problems before. As Steve Krug says in his book Don’t Make Me Think, “conventions are your friend.”
Learn about what those conventions are, and what makes them good solutions. Research design patterns that address your design needs. Originality is not the be-all, end-all.
Pursuit of the Original in Web Design by Ben Hunt