Tell us more please. :P
My portfolio used to be about 50/50 in fixed income securities and real estate. I got lucky with the real estate, and I got out because I didn't think my luck would last forever. Now my portfolio is made up entirely of fixed income securities and blue-chip stocks that pay dividends. The dividends and interest payments are laddered such that I recieve at least 2 payments a month. I didn't choose securities based on payout dates, so the amount does fluctuate from month-to-month. However, the portfolio generates enough monthly income that the "leanest" month is greater than my paycheck's monthly gross income.
Being a software engineer myself, I don't qualify for the Roth accounts so most of my investments are done in a standard taxable account. I don't buy any particular funds -- just a variety of boring bonds and stocks.
I did try the RE (retire early) part a while back. It lasted about 6 months before I got too bored out of my mind. I still continue to work because of the mental stimulation and the social connections.
Just for reference, I was living on less than $750/month until I got married. The companies I worked at had plenty of free food. I didn't need a gym membership because the handyman work I did on my investment properties was more than enough. Until we had kids, my spouse and I were still able to survive on less than $1,000/month. We are based in the south SF Bay Area. We had 100% income replacement by our mid-30s.