The use of enumerated options

The use of enumerated options

I am not sure what would be the best-practice approach to type setting an
observation that has an enumerate list.
For instance, consider:
\documentclass{article}
\usepackage{enumitem}
\begin{document}
A bunch of text here. Obsevations
\begin{enumerate}
\item
\item
...
\end{enumerate}
\end{document}
Should I set it up as shown in the MWE?
Should I bring it down and:
\noindent Observations:
\begin{enumerate}
\item
\end{enumerate}
Should I keep it as the MWE but add : after observations?
Maybe this should be inline?
I am too sure on how this would or should be handled. Is there a universal
or a few standard approaches?