From now on – from the present into the future

I will do my best<em> from now on</em>.
<em>From now on</em> we have to arrive on time.

Little by little – gradually

We progress in class <em>little by little</em>.
The city grows <em>little by little.</em>

Take care of – give attention

John<em> takes care of</em> his car by sending it for a tune-up.
If people take <em>care of</em> their health, they will live longer.

That’s all – nothing more

I would like a cup of coffee,<em> that’s all</em>.
We are walking in the park, <em>that’s all</em>.

What’s the matter – what’s wrong?

<em>What’s the matter</em> with your car, it is making horrible noises?
<em>What’s the matter</em> with the government, the city is out of control?

Get mixed up – get confused

He <em>gets mixed up</em> when he doesn’t read the directions.
They <em>got mixed up</em> travelling in the new city.

Of course – naturally

<em>Of course</em> American children love chocolate.
<em>Of course</em> I speak English, I’m from the U.S.A.

Get in touch with – contact

John <em>got in touch with</em> his client early yesterday morning.
Please <em>get in touch with</em> me when you return to your office.

Prepositions

At = <em>time</em> at 1 o’clock, at 12:30, at 2:15 
On = <em>day</em> on Monday, on Tuesday 
In = <em>month</em> in June, in May, in January 
In = <em>year</em> in 1996, in 2000, in 2004 

Hope it helps