Can you help me on my investment strategy? What do you suggest I invest aggressively into?

My Husband is 53 and I am 10 Years Younger. During our 20-year marriage , I have been in and out of the workforce , raising children, and getting my PH.D. in economics. Now I plan to return to full time employment. I am essentially just getting my career under way as my husband approaches the completion of his. None of the retirement seminars address the issue that not all husbands and wives are the same age, nor do they retire at the same time.