These shots are always a bit tricky to get. Sometimes I play around with setting up my tripod and then positioning everything from there, but I find that very difficult. Being that close to a wide angle lens, there are a lot of small compositional adjustments that need to be made to counter any slight movement. So what I normally do is some kind of crazy deal where I hold my camera with one hand and compose and take the picture. That only works for people with Franz Liszt like hands though.