If you leave your car
And you're not going far
Remember what time to be back
If it slips your mind
I'm sure in time you'll find
A Rita waiting in a mac
Instead of the implied "meter maid," there's just the name "Rita." I'm pretty sure this is something of a reference to the Beatles' "Lovely Rita" from Sgt. Pepper's Lonely Hearts Club Band, specifically its recurring line "Lovely Rita, meter maid." "Do the Best You Can" seems to assume familiarity with "Lovely Rita," and uses the name "Rita" as a short-hand for "meter maid."
I checkt the chronology, and it works out. According to Mark Lewisohn's The Complete Beatles Recording Sessions, Sgt. Pepper was released on 1 June 1967, and according to the liner notes of 30th Anniversary Collection, "Do the Best You Can" was released over a year later. It was the A side of singles in the U.S. and West Germany in July 1968, and the B side of "Listen to Me" in the U.K. in September 1968.
I checkt the chronology, and it works out. According to Mark Lewisohn's The Complete Beatles Recording Sessions, Sgt. Pepper was released on 1 June 1967, and according to the liner notes of 30th Anniversary Collection, "Do the Best You Can" was released over a year later. It was the A side of singles in the U.S. and West Germany in July 1968, and the B side of "Listen to Me" in the U.K. in September 1968.