Taking a time-lapse is a complex task. Unlike a photo, which you can chimp and (usually) retake, retaking a time-lapse is not as trivial. This is why understanding how time-lapses work and how to take them is crucial before going out on the field.
This tutorial by Mark Gee (previously) is a full crash course on time-lapses taking you from planning through setting up, doing the actual capture, post processing and exporting. Mark is using Photopills for planning and a Syrp Ginie + Magic Carpet for moving the camera, but the principles apply to time-lapses taken using any gear. Hit the jump for a full video and clickable TOC.