How do you as individual contractors keep track of projects deadlines and scheduling while sending estimates and invoices? How many customers do you have or take on at a time? Seems like a lot of time would be spent doing other upkeep tasks i.e. sending emails and whatnot. How do you manage being a part time project manager as well as an engineer? Seems like alot of companies just want to give me stuff that isn't in a neat package. I know they outsource so they don't have to do as much work on it but I am not a project manager yet. Thoughts?