Magento has made the installation process a reasonably easy-to-follow affair. Since you've probably completed at least one installation before (and who hasn't tried Magento out-of-the-box?), you're familiar with the process.
However, you can make the installation more successful, just by adhering to the following battle-tested advice.
If you have never installed Magento before, it is not all that difficult. For assistance, there are a number of great resources, including the Packt book, Magento: Beginner's Guide. The Magento website also has an installation wiki (http://www.magentocommerce.com/wiki/1_-_installation_and_configuration/magento_installation_guide).
If your Magento installation ...