Sometimes SharePoint Designer loses touch with reality – it demands to check out files that are not checked in, refuses to check in other files and generally misbehaves. This demeanor is sometimes accompanied by this error message:

Cannot perform this operation. The file is no longer checked out or has been deleted.

Simply put, SharePoint Designer is out of sync with SharePoint and you have to delete its cache in order to rebuild it. The cache is composed of these 2 folders:

• %APPDATA%MicrosoftWeb Server ExtensionsCache
• %USERPROFILE%AppDataLocalMicrosoftWebsiteCache

via Clear SharePoint Designer cache – Ami's SharePoint Blog.

How would you like to drive a Lamborghini Diablo?
 BTW, you just learned how to ride a bike yesterday

Build Solutions & Don’t Showcase Features
 Engage users and help them identify pain points
 Inefficient processes
 Lack of automated tools
 Build solutions based on
 Audience background
 Usability Requirements
 SharePoint capabilities
 Provide RELEVANT training and support
 Gather feedback once the solution is deployed
 Continuous improvement is important

Example: Automate Change Request