Kiplinger's associate editor Miriam Cross talks wedding guest etiquette and offers tips on how to attend without breaking the bank this summer. Also, hosts Sandy and Ryan explain the advantages of investing in 529 college savings plans. — LINKS — A roundup of Kiplinger’s 529 plan coverage: www.kiplinger.com/fronts/special-report/529-plans/index.html; How to be a money-smart wedding guest: www.kiplinger.com/quiz/spending/T062-S003-how-to-be-a-money-smart-wedding-guest/index.html; Wedding gift etiquette: www.kiplinger.com/article/spending/T062-C000-S002-the-etiquette-of-giving-wedding-gifts.html; Rules for buying wedding gifts: www.kiplinger.com/article/spending/T050-C000-S002-rules-for-buying-a-wedding-gift.html; Is cash an appropriate wedding gift? www.kiplinger.com/article/spending/T062-C013-S002-is-cash-an-appropriate-wedding-gift.html; Get financially ready for wedding season: www.kiplinger.com/artic...n.html; Habitat ReStores: www.habitat.org/restores; Salvation Army Home Pick-ups: satruck.org/donate/choose; Consumer’s Checkbook: www.checkbook.org/