How to embed fonts in your document

Sometimes you need font types embedded into your document, here is a good solution:

http://mohamednabeel.blogspot.pt/2009/10/fixing-font-not-embedded-issue-to-pass.html

Since I personally use kile to edit LaTeX documents, I process normally to create the .dvi, and then I use the commands

> dvips -Ppdf -G0 -tA4 file.dvi

> ps2pdf -dCompatibilityLevel=1.4 -dPDFSETTINGS=/prepress file.ps file.pdf

How to link webpages from latex

Use the hyperref package as:

\documentclass{article}
\usepackage{hyperref}
\begin{document}

Here's a link to \href{http://webpage.com}{text}.

\end{document}

See at http://www.johndcook.com/blog/2008/11/24/link-to-web-pages-from-latex-pdf/

 or

 http://en.wikibooks.org/wiki/LaTeX/Hyperlinks

How to create matrices

Generally the easiest way is:

$
  L = \left[
    \begin{array}{cc}
       x & y \\
       z & w
    \end{array} \right]
$

A good reference about the topic can be found here:

http://www.rizauddin.com/2009/05/how-to-create-a-matrix-in-latex/

An even easier way to do this is to use pmatrix as

$
  \begin{pmatrix}
     x & y \\
     z &  w
  \end{pmatrix}
$

 However this latter will always put the matrix inside round  parenthesis.

How to write math equations inside your blog

See here for instructions

write 1st, 2nd, ... nth correctly

Using the nth package as

\usepackage[super]{nth}

 ...

 \nth{<number>}

super is only needed if you want the "th" in superscript, this is the English preferred format, so I usually use as this

or alternatively

 k$^{\textnormal{th}}