Asset allocation when retirement is already secure
You will hear a lot about diversifying your portfolio, which typically means having a good mix of investment types, areas of investments, etc. I'd like to suggest that you should also diversify your sources.  Sad to say but the defined benefit pension is not a rock solid, sure fire source of security in your retirement planning. Companies go bankrupt, government agencies are reorganized, and those hitherto-untouchable assets are destroyed overnight. So, treat your new investment strategy as if you were starting over, and invest accordingly, for example, aggressively for a few years, then progressively safer as you get older. There are other strategies too, depending on factors like your taste for risk: you might prefer to be conservative until you reach some safety threshold to reach "certain safety" and then start making riskier investments. You may also consider different investment vehicles and techniques such as index funds, dollar cost averaging, and so on.