\appendix

\chapter{Appendix}

Here, maybe having an appendix, with each of the other things as 
sections?  Let's see.

\section{Bibliography}

\printbibliography[title={References}]

% Enable if used:
% Figures
% Tables

\section{List of Figures}
\listoffigures

%\section{List of Tables}
%\listoftables

\section{Todo Items}

This is here (the appendix), so it will show up in the table of contents.

Without some text here, it sadly is currently putting a totally empty 
page, then the list of todo items.  Not ideal.  That is a\todo{Todo 
item}, I would say.  

\listoftodos\todo{Figure out how to get the todo checkbox/colour to be here.}

\end{document}