Firstly, the thing you read about the 19.8% chance is wrong. Percentage isn't what breeding requires - it takes requirements.
For Ditto & Gollet:
If you have your Golett Egg, just walk 6,630 steps and the Egg will hatch. To do it quickly, I just ride my Bike up and down Route 3.
If your not using a Ditto, you will need Pokemon with the matching Egg Groups.
You can also get the young Pokemon to learn 'Egg Moves' via Breeding certain Pokemon with others.
Breeding & Eggs takes a bit of getting used to - it was tricky when I was a novice, but you'll get it eventually!