on the/(your) (starting) blocks

to be ready and waiting to start an activity.

The management is on its starting blocks, prepared for a flood of orders.

• slings and arrows
• slings and arrows of outrageous fortune
• Sling your hook!
• slip away
• slip into
• slip into something
• slip mind
• slip off
• slip off something
• slip of the tongue
• slip out
• slippery slope
• slip through fingers
• slip through the cracks
• slip through the net
• slip through your fingers
• slip up
• slip your mind
• slog guts out
• slog your guts out
• slough off
• slough off something
• slow on the uptake
• slug it out
• smack-bang