100-word version:
...I went on two mission trips to Mexico and the Dominican Republic, where I regained my motivation and developed genuine relationships with those I vowed to help always...

172-word version:
...I went on a mindless mission trip to the Dominican Republic that later altered my attitude in life entirely. Although my first impression of the country was unimpressive at best, I regained my motivation there...

197-word version:
After my first year in America, I went on a mindless mission trip to the Dominican Republic that later altered my attitude in life entirely. Although my first impression of the country was unimpressive at best, I regained my motivation there...