There is a staggering amount of content and in some instances, you can start multiple side missions and revisit them later after completing a main story objective mission. (thekoalition.com)
The more you help people by stopping crimes (or even just completing story objectives), the more the people in the city respect you. (snackbar-games.com)
I would climb, I would look about, and then I would generally get back down again and head to the next story objective. (stuff.tv)