How often should I check on my retirement investments?
- When do I need to start investing for my retirement?
- How much money do I need to invest for retirement?
- Where should I put my retirement money?
- What should I invest in?
- Stocks? Bonds? What's the right mix?
- Should my asset allocation change as I get older?
- What's the best asset allocation for my age?
- How much should I save if I want to retire early?
- How often should I check on my retirement investments?
Once a year is plenty. That's when you should make sure your asset allocation still makes sense for your age, and perhaps sell certain investments that have grown so big that your target allocation is out of whack. Reinvest the money in order to bring your asset allocation back where you want it.
One nice benefit of rebalancing like this is that it forces you to do what so many investors fail to do: Buy low and sell high. 
