Dan Biggar accepts that composure will be a key ingredient when Wales look to end their long losing run against major southern hemisphere opposition on Saturday.
After suffering narrow defeats against Australia and New Zealand this month, Wales finish their autumn series when South Africa arrive at the Millennium Stadium.
Wales have claimed just one victory from 27 starts against the Springboks, New Zealand and Australia during Warren Gatland's seven-year coaching reign.
Asked what is needed to get over the line, Wales fly-half Biggar said: "A bit of composure.
"We have played some good rugby in patches, but in crucial moments we've maybe fallen a little bit short.
"It's just about trying to stop them getting an early score back once we've got in front, and not give them anything soft.
"We did that pretty well against New Zealand (last Saturday). We didn't give them anything soft or any ins to the game until the last 10 minutes. We have to keep the scoreboard ticking over.
"There won't be anything too flash at the weekend. We will be looking to do the simple things right and close the game out.
"South Africa are a superb side, but like any team, if you put them under pressure you don't know how they will react.
"We are desperate for the win and we're hungry for the win, and I think that is a big thing. We've been saying it over and over, but we are fed up of coming so close and just falling short.
"I think Saturday is a huge test for us, but I think it's one that we are in great spirits for."
Wales have not beaten South Africa since 1999 - it was the first rugby Test played at the Millennium Stadium - and they must regroup quickly after leading New Zealand for 68 minutes before the All Blacks conjured a devastating spell of scoring 19 unanswered points in seven minutes.
And when Wales last met South Africa - in Nelspruit five months ago - they led for the entire game until conceding a 78th-minute penalty try, and the Springboks edged home 31-30.
Reflecting on the All Blacks loss, Biggar added: "We felt like we were in with a real chance after 68 minutes, but we let it slip at the end.
"It's all about moving forward now. We've put it to bed, and it's all about focusing on this week and making sure we put on a good performance and more importantly get the win.
"We know our record against the southern hemisphere isn't great.
"In the summer (against South Africa) we played a pretty complete game up until the last few minutes, and then we let it slip.
"We can take a lot from that performance, and hopefully we can push on and get the result on Saturday, because that's all that matters. A good performance will hopefully lead to a good result, but we would take a scrappy win on Saturday."