If you're an ASP.NET developer, please add your vote to this feedback to add one super small simple overload to the ControlCollection class that would make my life a heck of a lot easier.
It's such a pain in the ass to have to type this.Controls.Add(new LiteralControl("My Literal Content")) for custom server controls where a lot of literal content must be written out. I do this all the time especially now that I'm doing a lot of sharepoint web parts. I even proposed to write the method for them! :-)
public void Add(string literalContent)
{
this.Add(new LiteralControl(literalContent));
}