Backpacker, thanks. That all sounds very practical.
fisbangwallop, I should have been clearer. I do go online for a narrow route brief before flying, but as I get closer to flight time, internet access is sometimes trickier. After a brief stop at my destination I usually don't go through the NOTAMS all over again before returning. So my NOTAMs might be several hours old when I fly back. This seems to be normal GA practice, but I wondered if there was any official guidance.