How to use pagination in Magento

classYour_Module_Block_Entityname_ListextendsMage_Core_Block_Template

{    protected  function _construct(){

　　　　　// We get our collection through our model

        parent::_construct();

　　　　  // Instantiate a new Pager block

        $this->_entities =Mage::getModel('your_module/entityname')->getCollection()->setOrder('created_at', 'desc');

　　　　  // /!\ The limit must be set before the collection

        $pager =newMage_Page_Block_Html_Pager();// We set our limit (here an integer store in configuration).

　　　　  // Add our Pager block to our current list block

        $pager

            ->setLimit((int)Mage::getStoreConfig('your_module/entityname/pagination'))->setCollection($this->_entities);

        $this->setChild('pager', $pager);

    }

}

You just need now to include the call in your template (phtml) file :

<divclass="your_module_entities">

　　<?php foreach($this->_entities as $entity):?>

    　　<divclass="entity">

           <h2>

               <?php echo $entity->getAttribute1();?>

           </h2>

           <p>

                <?php echo $entity->getAttribute2();?>

           </p>

        </div>

   <?php endforeach;?></div><?php echo $this->getChildHtml('pager');?>