I plod away at it pretty much every day and the best advice is to just keep doing it ...
I'm a member of a writer's group that tries to meet 2 to 3 times a year who I met through doing courses at Raindance , which are great and affordable. Training is good and I’d also recommend the fabulous 2-Phils course, whatever your level. Plus they're really nice guys and I still chat with the people I met on the course 3+ years ago (there's also a closed fb page for attendees).
And then there’s the London Screenwriter's Festival. It's pricey but you take LOADS away from it, plus meet loads of other writers and you START the slow process of meeting 'people in the industry'.
I also work with a writing buddy - we don't (yet) co-write, but try to meet up regularly to read/review/critique each other's work. It's amazing what having another writer around can do - when you're stuck or even having them ask why a scene is there... with edits, I sometimes cut so much that I leave orphan scenes, or get so bogged down that I forget my point! An objective eye really brings out these things much quicker than doing it alone.
Sermon over. Hell, what do I know anyway!