Before you begin upgrading from Microsoft Office SharePoint Server 2007 to Microsoft SharePoint Server 2010, you should make sure that your environment is functioning in a healthy state and that you clean up any content that you do not have to upgrade.Before you begin upgrading from Microsoft Office SharePoint Server 2007 to Microsoft SharePoint Server 2010, you should make sure that your environment is functioning in a healthy state and that you clean up any content that you do not have to upgrade.

Clean Up - Before Upgrading to SharePoint 2010

Look for some things before you start upgrading stuff

• Delete unused or underused site collections and sites. You do not want to upgrade content that you do not have to keep. If it has been unused for a long time and will not be needed in the future, back it up, and then delete it to free storage and administrative resources, IMPROVE upgrade PERFORMANCE, and reduce upgrade risk.
• Remove extraneous document versions Large numbers of document versions can slow down an upgrade significantly. If you do not have to keep multiple versions, you can have users delete them manually or use the object model to find and remove them.
• Remove unused templates, features, and Web Parts Firstly,verify that no sites are using any template, feature, or Web Part. You can use the pre-upgrade checker (Stsadm -o preupgradecheck) and the Stsadm -o EnumAllWebs OPERATION to identify these customizations in your environment. If you are not using any customization, then you should delete it.
• Address large lists By default, large list query throttling is appliedafter an upgrade to SharePoint Server 2010. If a list is very large, and users use a view or perform a query that exceeds the limit or throttling threshold, the view or query will not be permitted.Check any large lists in your environment and have the site owner or list owner address the issue before upgrade. For example, they can create INDEXED columns by using filtered views, organize items into folders, set an item limit on the page for a large view, or use an EXTERNAL list.

Before you begin upgrading from Microsoft Office SharePoint Server 2007 to Microsoft SharePoint Server 2010, you should make sure that your environment is functioning in a healthy state and that you clean up any content that you do not have to upgrade.Before you begin upgrading from Microsoft Office SharePoint Server 2007 to Microsoft SharePoint Server 2010, you should make sure that your environment is functioning in a healthy state and that you clean up any content that you do not have to upgrade.

Clean Up - Before Upgrading to SharePoint 2010

Look for some things before you start upgrading stuff