LOTS OF GREAT TRANSLATION EXERCISES!
Translating sentences is a good way of practicing structures and comparing languages!
If you want to improve your translation skills, you are lucky: there are useful online websites which provide lots of exercises!
For example:
1. exercisesonline.com, where you'll find practice according to your level
2. lawebdelingles.com offers good grammar explanations for each level and great translation practice of the different grammar points.