I take a LOT of supplements, although I've been lax about taking them every single day like I used to. I've always had trouble swallowing pills since I was a kid, so sometimes they dissolve in my mouth before I get them down. Rather take supplements than prescription drugs, and so far it's been working for me.
I always take capsules over tablets, I think they dissolve easier in your system and easier to get down. I couldn't swallow the large softgels either after awhile of fish oil, so now I use the NOW liquid lemon flavored, which is the preferred natural triglyceride form.
I take Magnesium Citrate all the time, I think it's really important for muscle support (even the heart) and relaxation, also helps avoid cramping
.I take 300mg (2 capsules) of Natural Factors brand on most days. I won't take any calcium supplements anymore, I feel I get enough in my diet and I don't want calcium buildup in my arteries, my father in law had a major stroke because of that. Too often the calcium goes into the arteries instead of the bones, I take Vitamin k2 to help with this.
I take at least 2,000 IUs of Vitamin D3 almost every day, and up to 4,000 in winter. I also take a multi vitamin/mineral, currently using Solaray 'iron-free' Once Daily. Iron free since I'm post menopausal, I heard it was best for your organs not to have excess iron in your system if you're not menstruating anymore. Only way to get rid of it is to give blood.
Too many others to list all at once.

What I do is take all the vitamins out that I want, open the capsules up and dump the powder into a small glass jar with a cover. I add a small spoon of organic Turmeric Root powder, and a small spoon of NOW Chlorella powder, and a dash of black pepper. Then I add just an inch or so of orange juice and shake. I drink that down quickly and rinse with a little more OJ. I follow that with a tablespoon of the fish oil.