The LensPen has won several product awards including Accessory of the Year. I use the brush end first to brush off any dust or particles that might be stuck on the lens. Then I use the other side to remove smudges. It works really well, and because it's so portable, I always have one with me. I usually order it from B & H Photo whenever I order other supplies, but I remember buying a generic version once from Longs Drugs awhile back. It's about $10.
This Leica lens cleaner cloth worked really well today too, but it was expensive for just a cloth - $12 online. I think one of those eyeglass cleaning cloths might work just as well.
I also wanted to show you my "photo studio". Wendell had new windows installed around our house, and now I got this beautiful light coming into our bedroom. I'm not sure if maybe it's especially nice because it's reflected off the neighbor's house, but I love it. Wendell wanted to tint the windows too, but I hope he doesn't. I put a big poster board on the bed, and use that to put stuff on.