At “81½ and holding,” Donna Hecker says she feels like she’s 60. Learning to square dance is near the top of her bucket list, but her first goal is to drive again. She’s hoping Optimal Aging will help her do that. The service, provided by Swedish and open to anyone, connects people with nonmedical services that can help them with personal care and everyday life. And, in Mrs. Hecker’s case, companionship while she recovers from knee surgery.