Don't underestimate this, man. It's big.
I've been in this completely alone for several years, which ended up by doubting eeeverythiiiing I did. So one day, while having a deep depression about not seeing any progress, I thought: Ok, I'll find someone (relatively) local who I believe has better chance of succeeding. May be I can help a bit or something...
So I found a guy like that. On Facebook. Still remember that first stupidly awkward conversation. "Hi man. I suck. You don't. Let's be friends!" ...lol. We've found out we have quite similar tastes and when it's possible, we comment each others tracks, WIPs and so on. Night and day difference. If you're making a piece of shit and don't know it, friend like this will tell you. If you're making something good while doubting it, he'd tell you again. ...and vice versa. You can help back if he needs fresh ears too.
So yeah. Find friends like this. As much as you can. It helps a ton.
...also if you live in bigger city, there's a chance there is a community of producers somewhere. Find it. Asap. I've found one and it's so awesome when we meet.