Keep trying. In the beginning my sounded like utter shit, I was trying out different genres, where I wanted to go, just figuring my DAW out and stuff.
Then you just gradually get better. Keep making new tracks, keep using different methods, try to push yourself to try new stuff. When using alot of samples: make a track with any sample, when only using vsts, maybe a track with only samples will teach you alot.
Look around at forums (like this), look at usefull(!) tutorials to learn new stuff.
There isn't really a way to suddenly become good and sound proffesional, trial and error mate. And before you know it, you'll make a track and think "this is actually pretty good"