Hello and welcome to Sean, your new timesheet manager!
I'll give you a quick run down of how to get started.
Here's the entry form. This is where you will input the jobs. You don't need to enter a time, we have a timer for that.
Here's where all your jobs will be displayed. Split up by this week and last week (because really you should be on top of your timesheets).
Go and add a job, start the time, and never have to worry about what you worked on when!