Question

what are different methods to reduce friction?

Answer 1

Methods to reduce friction are application of lubrication to machine parts
Using spicked shoes

Answer 2

There are number of ways to reduce friction such as:
1 - Make the surface smoother,because rough surface produce more friction and smooth surface reduce friction.
2- Lubricant is the another way to make surface smoother.
3- Make the object more streamlined.
4- Reduce the force acting on surface.
5 - Reduce the contact between the surface.