Clarke's team has been in fine form away from home as of late, winning three and drawing one of their last four outings, and will need to continue that run if they are to take anything from their clash with fifth-placed Cheltenham.
Following on from last weekend's victory over Salford City, which saw the Saddlers leapfrog the Ammies in the table, Clarke is expecting another difficult game and has stressed his team can’t rest on their laurels.
Speaking via the club's official website, Darrell said; "I don't worry about past endeavours to be honest. Just focus on the game, Cheltenham are right up there pushing for the top seven this season.
"I thought they were one of the better teams that came to our ground, it was a good game on the day. They pipped us there so we'll be looking for a little bit of revenge if we possibly can. We'll go and give it our best shot."
Walsall climbed into the top half of League Two following their victory at Salford last weekend and, having lost just one of their last nine league games, the manager is looking for the consistent run of results to continue.
Darrell continued; "It's a results-based business. The boys, over a consistent eight- or nine-week period now, are finding ways to win football matches. That's what it's all about. We have to keep continuing to do that.
"Whichever way that may be, with the ball on the deck or being competitive, normally it's a mixture of both. We just have to keep our focus and keep working away. Games of football are won on such fine lines.
"The mentality of the group is in the high percentage of how you win games. I think that'll always be the case with an element of 10, 15 per cent luck. Luck being injuries, suspensions.
"Luck as in, hitting the post or going in the inside of the post and going in. A decision where the referee gets it wrong. For me, mentality is a big percentage of how you get results.
"Certainly, a percentage of luck is in there but also for me, tactically as well obviously. It's a word I've used a lot of people are probably sick of hearing, but for me it's what it's about, the mentality of the individual.
"It's about working away and building on that when you're on a good run or a bad run. We'll keep focusing on that as well as the work we need to do on the training pitch."