I've been playing a few games against one of my friends recently and he always seems to kick my arse. He told me what he does is he just colonizes a planet, upgrades infrastructure once, builds mines and moves on - and spends the rest of his income on basic units. I can fight him off for a little while but eventually he has an fleet of equal size to me with more planets, though I've had some research done and my planets are a bit better developed. Anyway, he has me at a deadlock and he can just build up an economy while matching me unit for unit.
Can anything beat this strategy?