The former Queen's Park player set up fellow full-back Keith Watson for the opening goal in last weekend's 3-0 derby win at Dens Park and played a hand in several more during United's 5-0 William Hill Scottish Cup win at Stranraer the previous week.
Douglas has not scored since a 3-3 draw with St Johnstone in August 2011 but he is relishing the freedom to get forward and supply Jon Daly and Johnny Russell with crosses.
"Hopefully goals will come as well, I have been unlucky with a few free-kicks," the 23-year-old said. "But I just need to keep supplying, as long as someone else is scoring the goals. The gaffer preaches me and Keith to get forward and put balls in. If we don't put balls in they won't score."
Douglas, whose team host Inverness on Saturday, has made the left-back position his own after previously being kept out by Scotland international Paul Dixon, who left for Huddersfield in the summer.
Douglas was a regular in his first season at Tannadice after moving from Hampden in the summer of 2010, often playing in midfield, but he only made three more appearances after November last season.
"I am happy with the way I'm playing," he said. "I have always had belief in my ability, I just needed a chance to play and finally I am reaping the benefits and setting up goals. Every game I feel I am getting more confident and long may it last.
"I missed nearly a full year because Dicko has done so well. Doubt is going to creep into it, but I just kept believing and kept patient for my chance, and it was up to me to take it. It was hard not playing but you just need to get your head down and get on with it. It would be easy to spit the dummy out but you can't do that in this game."
Inverness visit Tannadice in second place in the Clydesdale Bank Premier League having scored in every game this season, including four against United in September, and Douglas aims to put a stop to that run.
Douglas said: "It gives us a great challenge, especially being defenders. We want to keep a clean sheet and we know we'll get chances up the other end."
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