Richard Of York Gave Battle In Vane. (Colours of the rainbow)

Never Eat Shredded Wheat

(North East South West)

Big Elephants Can Add Up Sums Easily

(Because)

Explanation:

These all used to help me a lot when I was younger, because they make sentences that are easier to remember than putting them separately.

I still use the never eat shredded wheat on for compass points and I'm 14, so it shows that they are always useful