We use present simple to talk about our daily routine and habits, for example: I get up at 6.00. I usually go to the gym after work. We use present continuous to talk about an action in progress, we often use "at the moment or now" with this tense, for example. At the moment I am working on my computer. She's playing her piano. Verb be + infinitive +ing Hope this helps :)

http://www.englishclub.com/grammar/verb-tenses.htm

Clair`s answer is very good. I just want to add a few more examples of simple present use. When we talk in general terms: I like books. When something is always true: The sun rises in the east. Any time you use words like: always, sometimes, usually, never, every day, every year, etc.. These are all simple present.

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