DON'T WATCH THIS ALL AT ONE TIME!
That should be fairly obvious for this kind of show, but I'm reminding you just in case. It's also especially applicable for this show, as most of the jokes are about the same subject (art), so if you watch too many episodes back-to-back, they'd probably start running together. Which is unfortunate because I think GA did a really good job at not repeating jokes. Sure, some of them are similar (like I said, they're all about art), but actual repetition is extremely rare, thanks to the themed episodes.
I also wouldn't recommend this series if you aren't interested in art. Shows like Hidamari Sketch can be enjoyed by anyone who likes slice-of-life, the art never factored in heavily, but this isn't the case for GA. If you aren't at least a little interested in art, you'll be bored to tears.