I've not been drawing long, but so far I can suggest (apart from the above "Practice", which goes without saying):
Comfort - if you're uncomfortable, you won't enjoy it at all, just like anything else. Good lighting, so your eyes are comfortable. Not a problem with digital art, o' course. Physical comfort; be where you can get nice and relaxed. A
comfy chair, perhaps a bed if you're able. And, y'know, temperature, and shit. You know what comfort is.
Music - to distract you a tad. I find silence can get you to be overly critical about what you're doing, not to mention more irritable whenever you fuck up (and if you're new like me, you'll fuck up a lot, just like any new skill). Find a good OST or something that gives plenty of background music. Having to stop every now and then to change music ruins flow. I've been sticking to this myself,
and yes, I'll take any opportunity to push Castlevania.
Oh, and if you want to draw, don't give up. Simple as that. I've tried getting into drawing several times over the past 6 or so years, and am only now just starting to have some success, almost certainly just because I didn't stick with it enough the first times round.