Disclaimer: I am not a doctor nor do I play one on TV so this is just my personal experience with vitamins and no one should follow it without consulting their own doctor for their specific needs. 
I did a LOT of research on vitamins online (National Institute of Health, Dr. Oz's recs on Oprah.com and numerous other health sites) plus talked to my doctor and here's what I am taking.
It took a bit of work to find the right combo of doses and products that met the requirements I needed. Some of these I take twice a day at breakfast and dinner, some just once. It's important to spread your intake of some vitamins, like Vit C, out in several doses over the day.
- Caltrate-D (calcium with extra vit D)
- CoQ10 (I was told that Nature Made brand is the only one that really the Q10 in it. Not sure why)
- B-Complex
- B-12 dots
- Vit E (natural mixed tocopherals)
- Omega-3 Fish oil (you want one that contains EPA and DHA and says no "fish burps")
- Acetyl L-Carnitine with Alpha Lipoic Acid (the bottle says it promotes memory and antioxidant support, but I take it because I am sometimes slightly hyperglycemic and it is supposed to help lower blood sugar)
- Multi-vitamin/mineral/antioxidant supplement called Multi-betic that has all the usual suspects plus it is a diabetic formula to help my blood sugar with ingredients like Chromium and Biotin.
- Then I either chew some Fiber Choice tablets or use BeneFiber powder mixed in drinks or food for extra fiber.
- I tried flaxseed oil for a while, using the oil that you mix in food instead of a pill. But it made things taste bad.
I am 35/F.