Demonstrate the differences
L.L.Bean previously offered an almost unbelievably generous return policy - customers could bring back any items bought at L.L.Bean if they felt it didn't live up to their expectations. The guarantee covered the item's full lifetime.
Offer a money-back guarantee
In February, the store reduced the return window to one year, which is still considerably better than a lot of stores.
Test your offer and price, and be creative.
REI also used to offer a no-questions-asked return policy where customers could return used items for cash. The return window has now been reduced to one year, but customers are still able to trial the products during that time.