There are time suji for creating extra time (e.g., virtual ko threats) and time suji for wasting opposing time (e.g., invasions filling every intersection of a huge territory region). When you create a ko fight just as a time suji, don't forget to have created it...

If you absolutely need time in any time system that rewards fast moves (e.g. Fischer, IGS), you can always burn ko threats. There are usually a couple obvious sente moves that don't accomplish anything on the board. Ideally you keep them to win ko's with, but better to have to avoid ko's later than lose on time.

Threats to a kill a group can be used when your opponent is low on time: it's often easy to see an attack that should be stoppable, but where the correct response isn't immediately obvious. It's a lot more important that the defender read correctly than the attacker in an attack that shouldn't succeed.

You can also find the trickiest looking area of the board and spend your time advantage reading deeply. Then start the sequence, and assuming you read correctly you can instantly respond to each move, giving your opponent no time to catch up on reading.

Good time management and long enough time settings lessens the need for such tricks.

I figured a Good Time Suji would involve some sake with the game.