I'm a great fan (and collector) of quotations. I have more than half a dozen books of quotations on my shelves.
My planner (work journal) has a different quote on every page. In writing MacPerl: Power and Ease, I took advantage of a style I've seen elsewhere we inserted a topical quotation at the beginning of every chapter.
I subscribe to two different "quotes by email" services Quote of the Day and Quote Me On It. The former actually sends 4 quotes each day!
Quote services on the web also include
- Familiar Quotations,
compiled by John Bartlett
(tenth edition, searchable) - Quoteland.com
- The Quotations Page (Quote of the Day)
- Wisdom of the Ages (Quote-a-Day with filters)
as well as many personal collections, including my own (miscellaneous quotes and
cat quotes).