More useful studies

Using studies as a training tool is (a) quite effective and (b) not that popular. As with other chess problems (in the classical sense) chess players tend to shy away from 'unreal' positions. But it is only looking at 'normal' positions, and 'normal' moves that can cause the biggest blunders.
The diagrammed position is from a game played at Street Chess last week. It was one of the last games to finish for the round, the crowd had gathered round, and White was running short of time. No problems. With the study like 1.Qa4 (resisting the usual urge in Queen endings to check like a maniac) White set up a mate in 1, and iced the game.