EditorPart does not have an ID

Full Error Reads:

EditorPart does not have an ID

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: EditorPart does not have an ID.

Resolution:
Just set the id of the tool part in its constructor to some string!

value does not fall within the expected range error while deploying web part

You encounter this error in visual studio while deploying a sharepoint solution (web part or similar project) using VSeWSS 1.3 or other versions.

Resolution:

Removing the pkg and obj folder and solution folder from the bin directory and rebuilding worked for many, It didn't work for me.
In my case it was because under the images to be deployed with the webpart, there was one image missing from the folder and visual studio was showing yellow icon besides it (because it was deleted outside the visual studio IDE). Due to this, VSeWSS 1.3 was not able to create the package for deployment.
I removed that missing image and deployment worked fine thereafter!

So ensure that you do not have any missing images linked in the Visual Studio IDE and then only deploy the solution.

'installutil' is not recognized as an internal or external command, operable program or batch file.

You get this error when you type 'installutil.exe' in a command prompt.
Reason: .net folder path is not set in the 'PATH' variable because of which location of installutil.exe was not found.

Resolution:

a) Use the visual studio command prompt, it will work there
b) Set .NET folder path in system's 'PATH' variable . Then try it should get the path of 'installutil.exe' and you can use it directly in any command prompt.