Dimitar Berbatov's stunning volley separated the sides and took the Cottagers into 11th place, eight points short of the 'magic 40' boss Martin Jol mentioned last week as his first target.
"We had a difficult period where we had bad results but we were playing not so well," Ruiz said.
"Now we are playing very good and getting the good results so hopefully we can finish the rest of the season playing good and getting the most points we can.
"We did what we had to do on Saturday, won, got three points and are looking at the top 10.
"We knew it was going to be really hard. Playing against Stoke is always difficult, they are a really strong team and it was difficult but we got the very important three points.
"We knew they're a really difficult team on crosses, throw-ins and corners but we trained on that this week and I think it was good because we got a clean sheet and it is very important for the team."