@Spammage What is a sure-fire way of making sure you don't burn?
Use Milo...just kidding. If you spill, a wet/dry vac comes in handy. Don't worry, your wife and neighbors already think you are crazy.
For spreading synthetics, the best way to ensure you are getting even coverage is to drop 1/2 in one direction, and then put the other 1/2 down at 90 degree paths to the first 1/2. Once you are calibrated to your spreader (know the proper speed, path width, spreader setting, etc), then you should be able to apply evenly with one pass.
Until you are comfortable, try applying 1/2 lb of N every 2 or 3 weeks instead of putting down the entire lb at once. It's better for the lawn anyway.
An easy tip is to keep a log of the product used and the spreader setting because different products with different prill sizes will flow and throw a little differently.
I also ALWAYS water in the app with the irrigation system. Rain is great, but to inconsistent. A tenth of an inch may not get the product to the soil, but a downpour will leave you wondering if you just fertilized the city sewer.