Yeah, I cut my scifi teeth on Heinlen during my junior high school years. I think my favorites were "The Moon Is A Harsh Mistress" and "Farnham's Freehold" plus the collection of his short stories, "The Past Through Tomorrow." I did get tired of his constant over emphasis on sexual themes, though, and I coined the term "Heinlenitis" to refer to any scifi author who, in their later years, would try and spice up their otherwise weaker offerings with sex.
Here is the complete list of stories found in "The Science Fiction Hall Of Fame Volume 1:"
A Martian Odyssey -- Stanley G. Weinbaum
Twilight -- John W. Campbell
Helen O'Loy -- Lester del Rey
The Roads Must Roll -- Robert A. Heinlein
Microcosmic God -- Theodore Sturgeon
Nightfall -- Isaac Asimov
The Weapon Shop -- A. E. van Vogt
Mimsy Were the Borogoves -- Lewis Padgett
Huddling Place -- Clifford D. Simak
Arena -- Fredric Brown
First Contact -- Murray Leinster
That Only a Mother -- Judith Merril
Scanners Live in Vain -- Cordwainer Smith
Mars is Heaven -- Ray Bradbury
The Little Black Bag -- C. M. Kornbluth
Born of Man and Woman -- Richard Matheson
Coming Attraction -- Fritz Leiber
The Quest for Saint Aquin -- Anthony Boucher
Surface Tension -- James Blish
The Nine Billion Names of God -- Arthur C. Clarke
It's a Good Life -- Jerome Bixby
The Cold Equations -- Tom Godwin
Fondly Fahrenheit -- Alfred Bester
The Country of the Kind -- Damon Knight
Flowers for Algernon -- Daniel Keyes
A Rose for Ecclesiastes -- Roger Zelazny
These are all very, very good stories from the golden age of science fiction.
Besides "The Weapon Shop" my other personal favorite from this list is Ted Sturgeon's "Microcosmic God." Sturgeon had one of the wildest imaginations in science fiction and it was coupled with an excellent writing style which resulted in lots of hits and almost zero misses in his bibliography.
Another really good (and exceptionally creepy) story is "Mimsy Were The Borogoves" by Lewis Padgett which was recently bastardized (and hence, ruined) in film. This story is one of those rarities in scifi, a unique take on first contact with extraterrestrial life.
Anyway, The entire set of the "Hall of Fame" books is a highly recommended purchase for anyone who appreciates science fiction. The stories in Volume 1 was chosen (by Robert Silverberg) from a vote tally by the Science Fiction Writers of America. Subsequent books in the series (there are four more volumes) were all Nebula Award winners that run through 1974.