I admit my Macbook Pro is old (early 2008 model), but it has 4 GB RAM. All current Macbook Air models have at most 4 GB, some have only 2, so 4 GB ought to be enough. But for me it is not. I have fond memories of a time (good Leopard/Snow Leopard days) I could open any number of windows simultaneously and never worry. Recently I've stopped using Mail to save memory, because Google Chrome is almost always running, and it's one of the biggest offenders RAM-wise, so why not use Gmail's web interface, which is excellent. Every time I open a program, I have to count the number of programs that are currently running to see if I should close a few. Never have too many large PDFs open in Preview. Sometimes I check things in Activity Monitor. CPU mostly idle, disk very slow as always (oh well), and fairly often no free memory. Are the days of 4 GB being enough over? Or am I doing something wrong? Does anyone have tips to reduce RAM memory usage?