Here is a few tips:
Wiggle the spark plug boot back and forth before pulling it off. That will free up the connection and avoid the plug wire connector from pulling apart.
Once all the wires are off, you need to use some compressed air to blow the dust, grit and sand out of the spark plug tube as this grit accumulates around the plug and will just fall into the cylinder when the spark plug is removed.
If the plugs are hard to remove. spray some WD40 into the spark plug tubes and let it sit for a while.
Gap the new plugs .050 and apply a small amount of anti-seize on the threads.
Torque the sparks plugs, do not overtighten.
Spray the boots with some silicone spray and put di-electric grease in the boots. This will keep them from arcing in wet weather and keep them from sticking