A story must have a plot. No exceptions. If there is no plot there will be no story. If you just randomize things you will confuse the crap out of your readers. And when readers are confused you won't get very good reviews. Also be original! Do NOT copy the ideas of others. Unoriginal stories are frowned upon and end up uninteresting and that is a turn off for potential readers. So come up with ideas. This may take some time but it is totaly worth it! Once you come up with an original story plot do some research and make sure you know the plot details inside and out backwards and forwards. Know the time period, landscape, buildings and archetecture, and weather. These are all very important details to research. Then once you have all of this figured out you can move on to developing characters. The topic of characters is found in a different blog post. Anyways after the characters comes the time to put the story together and make it really come to life. While putting it together you will want to make changes and that's ok but make sure you're sure of your descisions. The same with adding or taking something out of a story. Well that's all I got for plot.