Freebie of the Week: Join the public in singing — or listening to — the free seventh annual sing-along of Handel's "Messiah" at 1 and 3:30 p.m. Sunday in the stately East Room of the Richard M. Nixon Library and Birthplace, 18001 Yorba Linda Blvd., Yorba Linda. Bring your own musical score or borrow or buy one at the event (supplies are limited). Singers and guests are asked to dress in 18th-century costume, if available. There will be free parking on site, with free overflow parking across the street at Friends Christian Church. Doors open 30 minutes before each performance. Call (714) 996-1960.
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Didn't dare to brave the crowds for this year's Black Friday extravaganza? Lucky you! Cyber Monday, the e-commerce equivalent, is just around the corner, and lets you do all of your shopping in your pajamas. Also, be sure to "Like" all of your favorite retailers on Facebook for special fan-only offers from companies like Best Buy and Toys R Us. Into companies like Foursquare? Get special discounts or even gift card giveaways when you "check in" at lots of retailers this weekend.