From mountain trekking in India to a silent retreat in Bali, I've been fortunate to travel solo multiple times in the past decade. Over the years, I've found that mixing tours with independent travel helps me get the most out of my trips. Meeting people is high on my priority list, as is feeling safe when I travel. Here are some tips to do both. In the southern state of Kerala, India, I stayed at Soul and Surf , a guesthouse in the town of Varkala that specializes in yoga classes and surfing