A trick that I recently discovered is TODO comments, starting with either,

   /// TODO

or just,

   // TODO

You can add them in yourself like the ones that VS generates for you in constructors and when you compile, they show up in your task list if you aren't filtering comments out, which I think VS does by default. A colon following TODO isn't necessary.

This is useful for making notes to yourself if you are temporarily commenting out code, need to implement something later, temporarily hardcode something in, or just want a reminder to yourself. Like other tasks, you can double-click on TODOs in the task list to be taken right to them, which is convenient. You can filter them out and only look at errors if you want to forget about them for a while and focus on errors.

When I use regions in C#, I include the region name after the endregion tag, i.e.,

   #region event handlers
...
#endregion event handlers

which makes it easier for me to see which #endregion I am looking at. VS just ignores the information after the #endregion, but it is clearer.