Two quickie ones today over which people often get confused.
Farther vs. Further
The key point to remember here is distance. If any kind of travel or physical distance is involved, it is farther. If you mean something 'additional' it is further.
He travelled farther than he had intended.
He looked for further information on the forest walks.
Peel vs. Peal
For this one, just think two e for oranges.
Peel is the rind/skin of a fruit.
Peal is the sound of laughter or bells.