As much as possible, have students teach and help each other!
Have a snack (once again, snack can be important!)
Have a competition time (this adds excitement and fun to your club time). Possibly
have prizes for mathletes that improve thier scores.
MATHCOUNTS.org has sample session (lesson) plans available on their web site that
can be followed step by step during meetings. This page also has a coaches' toolbox
that list many things the students need to memorize and a sample score sheet.
Here are some recommended sites for extra student practice. These could be assigned
as take-home work