I usually stay with one project until it is done. My workshop space limits me to only one bike at a time. If the project is something that will be a long time between stages, like waiting for good weather to apply paint, I'll box up the parts and hang the frame on a hook so I can work on something else. My shop can get crowded when I bring in a second bike to steal parts from.

I usually make a work list of things I want to do over the winter. In the summer, riding time is valuable, so I'll try not to do any big projects or I'll save them for rainy days. Small jobs I try to do right away, as they come up.