Squeezing space with LaTeX

I was trying to find ways  to correct large vertical spaces between paragraphs. After serching a bit on internet, I got the following command along with other options. So I wanted to share it here and for my own future reference.
Remove the spac­ing between para­graphs and have a small para­graph indentation

\setlength{\parskip}{0cm}
\setlength{\parindent}{1em}

Source:
http://robjhyndman.com/hyndsight/squeezing-space-with-latex/
http://www.terminally-incoherent.com/blog/2007/09/19/latex-squeezing-the-vertical-white-space/
http://www-h.eng.cam.ac.uk/help/tpl/textprocessing/squeeze.html
https://ravirao.wordpress.com/2005/11/19/latex-tips-to-meet-publication-page-limits/

Make your text block as big as pos­si­ble. The sim­plest way to do that is using the geom­e­try package:

\usepackage[text={16cm,24cm}]{geometry}

Use a com­pact font such as Times Roman:

\usepackage{mathptmx}

Remove space around sec­tion headings.

\usepackage[compact]{titlesec} \titlespacing{\section}{0pt}{2ex}{1ex} \titlespacing{\subsection}{0pt}{1ex}{0ex} \titlespacing{\subsubsection}{0pt}{0.5ex}{0ex}

Beware of enu­mer­ated and item­ized lists. Instead, replace them with com­pact lists.

\usepackage{paralist}

\begin{compactitem} \item ... \end{compactitem} \begin{compactenum} \item ... \end{compactenum}

If you are allowed, switch­ing to dou­ble col­umn can save heaps of space.

\usepackage{multicols}

\begin{multicols}{2} ... \end{multicols}

If the rules say 12pt, you can usu­ally get away with 11.5pt with­out any­one noticing:

\begin{document}\fontsize{11.5}{14}\rm

When you get des­per­ate, you can squeeze the inter-​​line spac­ing using

\linespread{0.9}

There is also a savetrees pack­age which does a lot of squeez­ing, but the results don’t always look nice, so it is bet­ter to try one or more of the above tricks instead.