Hi Mili,

By regular immersion in the language.

Set all of your everyday items names to French -- phone, car satnav, difficult but ultimately rewarding.

This is a marathon not a sprint.

Bon courage.

Jim hit the most important point already: be consistent and keep at it. The second most important thing is to be having fun doing it. Because a positive attitude is conducive to learning, whereas a negative one will make it extra difficult.