In reply to zimpara:
I do not agree with a trad lead solo recommendation. It needs a lot of research, thinking on how to retreat/self-rescue, etc. Building anchors is also not that easy either. Lots of skills and practice is needed to make it safe. Showing how to do it is fairly straightforward, but can be deadly. I am not sure whether I'd climb with someone who has no idea what is he/she doing or lead on my own.
Top roping solo with a Petzl Shunt (and preferably with some sort of back up device, like Petzl Traxion or Wild Country Ropeman) would be a lot much better option. You can also do more climbing even if you have to set up top rope for each climb. While solo leading, you will spend a tiny amount of time actually climbing (flaking ropes, building anchors, leading, etc.).
Source: I have done a little bit of solo leading. The problem was, I was aiming for multi-pitches rather than perfectly straight and short single pitch cragging.
I am not discouraging you not to try any method (free solo, lead solo, top rope solo...), but do your research. There are very few devices which are designed to be used for soloing and their substitutes (Shunt, Grigri, etc.) can be deadly.