“Forget yesterday — it has already forgotten you. Don't sweat tomorrow — you haven't even met. Instead, open your eyes and your heart to a truly precious gift — today.”

The Creation Of Human Ability (1954).

Source: Love, Stargirl

My Heart's in the Highlands (1939)

The quote is usually regarded as anonymous, but is often attributed to her on several websites, as well as in several books, including My Life Is an Open Book http://books.google.es/books?id=qCOa1k--dt4C&printsec=frontcover&hl=es#v=onepage&q=eleanor%20roosevelt&f=false (2008), The Spirituality of Mary Magdalene http://books.google.es/books?hl=es&id=BLRuINwzVZcC&dq=eleanor+roosevelt++%22past+is+history%22&q=eleanor+roosevelt#v=snippet&q=eleanor%20roosevelt&f=false (2008), Mis cuatro estaciones http://books.google.es/books?hl=es&id=QCgANqKq8EIC&dq=ayer+es+historia%2C+ma%C3%B1ana++misterio.+Hoy+regalo+de+Dios+presente&q=%22eleanor+roosevelt%22#v=snippet&q=%22eleanor%20roosevelt%22&f=false (2008), and Gilles Lamontagne http://books.google.es/books?ei=MdG9UqGQK-fL2wX5zYC4Dw&hl=es&id=WyFKAQAAIAAJ&dq=Hier+est+de+l%27histoire%2C+demain+est+un+myst%C3%A8re+et+aujourd%27hui+est+un+cadeau.+C%27+est+pourquoi+nous+l%27appelons+%C2%AB+le+pr%C3%A9sent+roosevelt&focus=searchwithinvolume&q=eleanor+roosevelt (2010). None of these works cite any original reference.
Disputed

Source: Life, the Truth, and Being Free (2010), p. 89

Source: Life, the Truth, and Being Free (2010), p. 36

Source: ヴァンパイア騎士 7