The Scarlets centre came off the bench at Twickenham last year and snatched a match-winning try to hand Wales the Triple Crown.
Williams stripped Courtney Lawes of the ball, chipped over the top and won the race to touchdown with just five minutes to spare.
Wales withheld a late rally from England to secure the victory and Williams joked that he would no longer have to buy a drink.
Now he is determined to have a similar impact as Wales target the Six Nations title and England a first Grand Slam in a decade.
“Any thing like last year would be great for me,” said Williams.
“It was a really special moment in my career and to go on to win the Grand Slam was massive.
“People speak about what I did in that Triple Crown game but you forget what Leigh (Halfpenny) and Jon (Davies) did at the end.
“Nobody would have remembered my try if England had got over at the end. What they did was just as important.
“But it’s starting to wear off a bit now, there’s no more free drinks so I’ll have to do something again this weekend.”
Wales can successfully defend their Championship title if they win by seven or more points on Saturday.
Jamie Roberts and Davies are likely to continue as the centres of attention with Williams on the bench.
He admits playing behind the established midfield can be frustrating but he is desperate to produce another super sub display.
“They are two established players so all I can do is keep training hard,” added Williams.
“Jon and Jamie have been playing very well so there is no reason to not select them.
“When I take the field I have to do as much as I can and carry on where they left off.”
