Where can I get the text of the widely-quoted poem beginning "That man
is successful who has...." and then lists a whole series of life
accomplishments (laughed a lot, loved well and often, etc). The poem
is often seen on greeting cards, posters, etc.

Hi dan37,

Here you go - said by none other then Robert Louis Stevenson.

The Quote Garden: Quotation About Success:
"That man is successful who has lived well, laughed often, and loved
much, who has gained the respect of the intelligent men and the love
of children; who has filled his niche and accomplished his task; who
leaves the world better than he found it, whether by an improved
poppy, a perfect poem, or a rescued soul; who never lacked
appreciation of earth's beauty or failed to express it; who looked for
the best in others and gave the best he had."  ~Robert Louis Stevenson
http://www.quotegarden.com/success.html

World of Quotes: Success:
http://www.worldofquotes.com/topic/Success/2/

Quotes of Integrity:
http://digiserve.com/kazoo/integrit.htm

Quotations: Inspirational:
http://www.4degreez.com/quotes/mquotes_inspire_d.html

I'm glad to have been able to find the quote for you. If you have any
questions, please post a clarification request before closing/rating
my answer.

Thank you,
hummer

Google Search Terms Used

"man is successful who"