Here’s an interesting website to practice your design decision-making and help fellow designers at the same time. It’s called Desinion, a website where designers post incomplete designs and/or vote on their favorites.
Designing something, say a logo, often leads to a crossroads; and sometimes it’s tough to choose. Desinion may be able to help you by letting other folks vote on your designs and share their opinion. This can be especially helpful if you’re a freelancer or don’t have a fellow designer nearby to bounce ideas around.