I'm sure I don't need to point out the obvious one, drop your intel to 50 and spend the 800 points elsewhere!
Remember that monoliths are extremely expensive and that too many being built at once will cripple your economy.
Same thing goes for planet modification facilities.
All worlds have value once the atmosphere has been converted.
Resource conVersion can save your butt.
At the very beginning you need to keep in mind that your space yards use more resources each turn than in a normal game.
These are just a few things I can think of. Ask around, I'm sure there's more that I can't bring to mind. Tesco was always better at this than me.