< from &lt;
> from  &gt;
& from &amp;

Also, some special symbols if your keyboard/system does not have them conveniently at hand:

Units & Math:

€ from &euro;
¥ from &yen;
£ from &pound;
¢ from &cent;
° from &deg;
× from &times;
÷ from &div;
½ from &frac12
¼ from &frac14
¾ from &frac34

Suffix marks:

ª from &ordf;
º from &ordm;
¹ from &sup1;
² from &sup2;
³ from &sup3;

Non-ASCII7 Punctuation:

¡ from &iexcl;
¿ from &iquest;
« from &laquo;
» from &raquo;

Classical printer symbols:

§ from &sect;
™ from &trade;
® from &reg;
© from &copy;


I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.