There are a few tips I can give for creating this sort of music. First, keep a rather low bpm; I'd choose a maximum tempo that seems right to you and never exceed it. Second, you will need to learn how to make thick pad sounds. Not every song will require these (some may use strings and orchestra for example), but it's an invaluable skill for any music producer.
My personal max bpm (for chill music) is 112. Try to use simplistic drum beats because overly intense beats will make your song feel faster. Your instruments could be quick, but it's usually best to use a flowing sound such as an arpeggio. You might try remixing a song you like, and slowing down the vocals. This will make your vocals feel chill by comparison :33
As for pad sounds, you'll probably be looking into using a multi oscillator or unison plugin. (You can't reasonably make a thick sound with a lonely square wave.) You'll need to use a reverb, but if your synth begins to sound like a trance lead, tone things down a notch. Also, stereo widening will be useful as well, but be sure to apply it after reverb in your effects chain. That way, it will effect both the wave and the reverberation ^^
Finally (and most importantly), let go of perfection. If you allow your music to be imperfect, you will have far more creative freedom than you might otherwise. As a consequence of this, your music will actually be better than the "perfect" song you might have tried to write before.
And all the best of luck <3
~SkullcandyPegasus