Agh I feel your pain man. I think everyone of us have dry spells every now and then... Except maybe Erus, who ALWAYS seems to have an idea
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Ususally when I'm in need of inspiration I sit down and listen to some metal, read a good science fiction novel, watch a movie or two, or just explore some other art form. Just do something else you enjoy, doesnt really matter what as inspiration can come from anywhere at anytime. Just take some time to recharge your mojo.