Como dizer "Turbinar[melhorar]" em inglês

and...
1. On Friday 23rd April image expert Sue Trevaskis will be at the hotel to teach you how to improve your looks so that you can look your best.
2. Improve your English skills effectively.
3. Cut your costs, improve your profits.

In informal situations, sometimes you will hear "to jazz up" when someone is adding additional decorative touches to a cake, car, etc. It would not be suitable in the three examples above.

To pump up

"Pump up the football, replace batteries and wash down the playhouse. Doing these jobs now will make their toys much more attractive to them." The Guardian