The phrase 'In the Groove' is used to describe doing something easily and well.
Example of Use: "I haven't played in a month, but with a bit more practice I'll be right back in the groove."
Interesting fact about In the Groove
The first record players were marvelous inventions, but took some work to operate correctly. Instruction manuals accompanying these machines informed operators of the importance of keeping the stylus firmly in the record’s groove to ensure sound quality. The idiom 'in the groove' coincides with the arrival of jazz in the 1920s, when people talked about performers and dancers being “in the groove” when they did well.
