Adding fonts to your site is quick and easy:
First, create your Typekit account. Choose from among these available plans; all paid plans are free for 30 days, so you can try Typekit out risk-free.
Once you’ve created your account, choose some fonts! You can filter by Classification (e.g., serif or sans serif), Properties (e.g., x-height, width, or weight), or Language. You can also filter by two recommended categories: headings and paragraphs; these fonts are hand-picked by Typekit’s staff. And you can combine these filters any way you like: for example, you can narrow your results down to sans serif fonts, recommended for headings, with a narrow width, and low contrast that support English and Spanish.
When you find a font you want to use, click “Create a Kit”.
A kit lets you configure the fonts that Typekit will apply to your website. Give the kit a name, and enter the domain(s) for your website. (You can add up to ten domains per kit, including subdomains and development domains.)
You’ll be given the embed code for that kit; copy and paste it into your site’s <head> tag. (If you're using Typekit with a blogging platform such as WordPress.com, Posterous, or TypePad, then you can copy the Kit ID—the seven-character alphanumeric code in the JavaScript filename—into your blog's settings instead. Read more about using Typekit on your blog.)
You can add more fonts to your kit at any time by clicking the “add to kit” button.
Now, launch your Kit Editor. You have a few choices you need to make for each font.
First, choose the correct character set. If you aren't sure which set you need, click "Which should I choose?" for guidance.
Next, select the weights and styles you need. In most cases, only three weights and styles are necessary: regular, italic, and bold.
Keep an eye on the total kit size; too many fonts can slow down page loading. When your kit size exceeds 400K, you’ll get a warning to reduce the size to improve performance.
Next, add selectors to each font. You can either add selectors in the Kit Editor or assign the font family names in your own stylesheet.
Finally, publish your kit. Within a few minutes, the fonts you selected will appear on your site. Remember to republish your kit each time you make changes.