What can I do about sluggish acceleration in my Toyota?

Start with a good tune-up (NGK spark plugs one step hotter than factory could do wonders, a clogged air filter can cause loss of airflow to the intake system which means less potential combustion, and a clogged fuel filter can cut down on fuel pressure which means less gas which means...well, I think you know). It might not hurt to try a little bit of fuel treatment either. Lucas makes a decent priced, highly effective treatment that just might address your needs.