If you use wordpress, you might consider using adsense plugins. This makes life easier by preventing you to insert the code for each and every post your make. There are several plugins that will automate the process.Here are some of the most popular Google adsense wordpress plugins
WordPress allows bloggers to easily integrate Google Adsense inside wordpress using plugins. Google Adsense has become the most popular online contextual advertising program and proper custom integration with WordPress can help to increase Adsense earnings.