Cool your prints! The above photo shows the benefits of this. If you want to see a dramatic improvement in your print quality, adding a cooling fan upgrade is the cheapest and easiest mod you can install on your printer.
All slicing software allows you to fine tune your fan behaviour before exporting gcode. I have the fan off for the first layer to ensure solid adherence to the print bed, then dial it up to 100% speed for every layer after that. I find that gives me the best results for a wide variety of print scales and complexities.