How do you combine fonts? Which types of fonts work nicely together?

[addisoncave]

How do you combine fonts? Which types of fonts work nicely together? How many different types is OK to use on a website?

[ORLOVA]

One very easy way to combine multiple fonts from several typefaces is to design a role-based scheme for each font or typeface, and stick to it.

[davidweb09]

you have to choose the font size & colors according to your site templates.