Barry Ritholtz gave a very solid interview to TechTicker recently. It is very reasonable and incorporates a long-term view of the markets. Among other things, he cautions against declaring the death of buy and hold investing.
The market hasn't moved in eight years. That means that you might have another chance to buy great companies for the same fire sale prices they had right after 9/11. That sounds pretty good to me.
Take advantage of this opportunity. It won't come around again for a while, if ever. Look at the 52-week lows list.