Accelerator pedal laggy?

Adjust your throttle cable.

Under the hood, loosen the cable clamp nut (red circle).
Then slide the cable housing back (green arrow) until almost all the slack between the bracket and the carb is taken out of the cable.
Re-tighten the clamp nut.
Edit: @mygasser has a point- make sure your floor mat isn't just jammed up under the pedal first.