There are lots of different ways to practice the different language skills. Watching TV and movies helps with listening skills. So does listening to music or the news on the radio (and there is internet radio!)
Keeping a journal in the language is a good way to practice writing. You can write other things in the language, like grocery lists or email drafts, as well. Reading different types of material helps with the different reading skills.
And conversation partners can help with speaking skills.
Keep a journal
Watch series and movies
Participate in an online challenge
Find local meetup in your city
Read the news
Listen to music
Change your phone and your computer language