it depends on what your project consists of:
1. if its videos – use proxies
2.if its 3d scenes and complicated effects try
1.render the scenes that are done (like background)
2.try using the capslock and than
move from scene to scene (it will save you the time
getting there..)
3.try toggeling the quality slider
thats all I can think of right now
maybe if you provided more details I could
remembers other stuff
Roei