Line Numbers
Go to Tools - Options - Text Editor. Select your language.
Immediate Window
Debug - Windows - Immediate Window
You can execute commands, define variables, classes and call your methods. You dont need to run your application. Detail Information - MSDN
Todo List
Start your comments with "Todo:" These comments will be showed at Task List window. The comments with start these special words in all over your solution are showed. There is also Hack and Undone markers.
To open Task List window go to View - Task List. Choose "Comments" from dropdown menu. If you choose "User Tasks", you can create tasks, assign priority and mark them as completed.
Detail information - MSDN
Refactor
Go to Refactor menu or right click and choose Refactor.
For example you can easily create properties from fields.
Custom Keyboard Shortcuts
Tools - Options - Environment - Keyboard - Assign your favorite keys
Customize Your Toolbars and Menu Items
Tools - Customize
Here you can arrange toolbars and menu items.
Code Snippets
You can easily insert pre-defined code blocks. You can design your own code snippets
Detail information - MSDN
Snippet Designer
Code Project - Create Your Own Snippets
Right click and choose Insert Snippet
Edit - IntelliSense - Insert Snippet
Right shortcut of snippet and ENTER
Open Complete Word Window ShortCut
ALT GR + Left Arrow or CTRL + Space
Complete Word Window Transparent
Press CTRL or ALT GR and hold for a while.
Its very annoying when you cant see the code behind it.
To be continued...
Happy coding