Present Simple versus Present Continuous

We use the Present Simple… 

To talk about habitual actions.

I swim every Sunday morning.

To talk about current situations.

I don’t talk to them anymore.

Or everyday truths.

The sun rises in the east and sets in the west.

And for timetables, which are similar to habitual actions, because they are established events that don’t usually change

What time does the train leave? The train leaves at 5, 7 and 9 o’clock.

We use the Present Continuous (am/is/are + gerund)…

To talk about actions occurring right now.

I’m playing the guitar with my friends.”

Even if we are talking about an extended period of time (an activity began at some point in the past and will finish at some point in the future).

I’m studying Biology at the University.

And it’s also possible to use it to talk about future plans.

I'm traveling to Mexico in August.

WARNING: You can’t always use present continuous for future plans (especially without future time reference), because it can be confused with a current action. For example: 

I'm watching a movie.  sounds like you’re watching one at this moment.

I'm watching a movie tonight.  sounds like you’re watching one in the future. 


So what are your habits and plans?