Anyone who hasn't had 'The blocks' is telling porkies!
I've found two things that work for me....
Leave well alone. The urge to model again will return in it's own good time, just be patient.
Or.....
Go on Ebay and have a look for the more obscure models on there and go for something totally different to what you normally build and have a crack at it.
Form my standing, the worst thing for me losing it, is repetition. Modelling the same genre be it aircraft or tanks, whatever, starts to get me loosing interest and I can feel 'the blocks' returning......but once I find something different to try, it certainly helps me get back on track.
Everyone is different, and like the common cold, sadly this modellers 'illness' have no known cure!!
Apart from all the above, the sun's out, it's summer, so st**f model making.....sort of! Is this a kind'a block?