For drops I've tried most (Bion tears, Refresh, Celluvisc, Genteal, Systane), but now I use Optive because they cause the least amount of residue on my contacts. You really just need to try a bunch and see which one works best for you.
I also use Aveeno daily moisturizing lotion. This seems to work the best for me, it's not greasy and it really lasts all day. Now that it's getting colder and my skin is getting drier, I've been looking for a good hand cream that isn't scented or greasy. The ones I have have fragrance in them, and I always manage to touch my eyes and get it in them and they start to burn. Any suggestions? Also in the winter, for the really dry patches of skin I always seem to get on my hips, I use cocoa butter. For my face I use Clinique Dramatically Different Moisturizing lotion. I have been using this for over 10 years and it works better than any other face moisturizer I've tried from the drug store. It runs around $25 for 4oz at department stores (Macy's), but it almost always comes as a trial size in the "free gift" offers when you purchase a certain $ amount of product.
For lips I use Lypsyl lip balm. It is a beeswax lip balm similar to Burt's Bees, but I think it is much smoother and not as harsh/minty as Burt's. The only place I have found this so far is Walgreen's. At night to keep my lips from cracking when the air is dry, I use Blistex medicated ointment (in the white tube) and I put Aquaphor on top of that. I think Vaseline would work just as well as Aquaphor.
I primarily drink water. My dentist said I should not drink soda because the sugar and acid can accelerate tooth decay, which is exacerbated by the dry mouth. Sometimes if I want soda I'll have seltzer instead. If I want something with flavor I usually have the lower calorie Gatorade (G2). I don't drink anything with caffeine anymore. I tend to chew sugar-free gum (Trident) most of the time. When I'm not chewing gum, I'm eating! Or I just tried the new Halls Refresh drops which work pretty well. They are sugar-free, I like the mint the best. My rheumy prescribed Numoisyn lozenges for my dry mouth but I prefer chewing gum or the sugar-free candy.