I used to use fairly common patterns in developing my lesson plans. It made it easier and efficient for me, and fairly predictable for the students. I don't think the students got bored from any predictability, but more likely appreciated it. If the lessons were interesting it was because they were active and engaging. (Unfortunately, I would let them down sometimes!)

I'd ask a question or make a statement about something to see if anybody already knows the pattern. "I used to ....."

Write it on the board (question and statement form.)

Demo.

Comp check.

Pairs work, to ask each other what they used to do.

Report back, what they learned about each other.

Use the form at least twice more in the rest of the lesson. Hearing it again soon reinforces it.

Include it in the next two homework asignments.

Review it in the next lesson.

This would usually take about a half hour to do, and generally had it toward the start of the class.