Doing voluntary refund since you can afford to will help you to build wealth in a meaningful and risk free manner.
I do not tell myself I must have so many % in stocks and so many % in REITs although I have been trying to build up my non-REIT portfolio due to future interest rates risk.
I invest when offers make sense to me.
When it comes to investing for income, in today's environment, if I can get 8% or higher from well run REITs and business trusts, that's not bad.
For stocks, if it is cash rich, a 3% yield based on a 50% payout or less is not bad but I would prefer 4% or higher.
Each of us will have to find out what is acceptable for us. :)