With this nice little needle threader from Clover, you can more easily thread needles of many different thicknesses.
It is robust and a handy aid if you find it difficult to thread a needle.
It is best suited for threads to be used on needles with a slightly larger eye (such as embroidery floss/mouliné thread).
The easiest method (that I know of) to thread a needle without a needle threader is to hold the needle in your dominant hand, then fold the thread over the needle while holding the thread between the thumb and middle finger of your other hand. Pull the needle up slightly so the thread is taut over it, and squeeze the top of this loop between your two fingers while pulling away the needle. Don't let go of the thread! The sharp fold you have now made in the thread is what you insert into the needle eye. By folding the thread, you avoid threads that are spun together from separating, as they often do when you try to thread the tip.
If this technique doesn't work for you, then you can try out this needle threader!