Thomas made his first appearance of the season following a hip injury in Tuesday night's 4-1 Carling Cup success at Bournemouth and opened the scoring after just seven minutes.
"I feel ready, especially with an extra day's training this week with the game being on Sunday," the 28 year old told the Express and Star.
"I'm ready to get back involved with the squad and hopefully help us start to put some points on the table in the Premier League.
"I thought we were unlucky in both league games so far to come away without anything but that's the nature of the Premier League, especially when you're playing against the top teams.
"Hopefully setting up and scoring more goals is something I can take into the first team and into the Premier League, because that's what wins games and gets points on the board.
"I was just happy to be back out there last night. It's always frustrating being injured, but I have been supporting the lads as much as I can and it was good to get back out there."
Thomas admits Premier League survival is West Brom's main target this term: "If we're being realistic, in the grand scheme of things staying in the Premier League is the No.1 priority. It was last season and it's the same this season.
"But it's nice, especially with the squad we've got, to get more people game time and it's good to get as far as we can."