Google Analytics

Pageview

// Analytics.js
ga('create', 'UA-XXXX-Y', 'auto');
ga('send', 'pageview');

Track events

// ga.js
// [..., category, action, label, value (int), noninteraction (bool)]
_gaq.push(['_trackEvent', 'Videos', 'Play', 'Birthday video', true])
_gaq.push(['_trackEvent', 'Projects', 'Donate', 'Project name'])
_gaq.push(['_trackEvent', 'Accounts', 'Login'])

// Analytics.js
//       ,        ,  category,  action,  label,         value (int)
ga('send', 'event', 'button',   'click', 'nav buttons', 4);

Variables

// [..., index, name, value, scope (optional)]
_gaq.push(['_setCustomVar', 1, 'Logged in', 'Yes', 2]);

// Scope = 1 (visitor), 2 (session), 3 (page, default)

https://developers.google.com/analytics/devguides/collection/gajs/gaTrackingCustomVariables https://developers.google.com/analytics/devguides/collection/gajs/eventTrackerGuide