When I arrive to work, record the time and location in a text file in Dropbox.

Dropbox lets people bring their documents, photos and videos everywhere and share them easily. Use Applets to sync your Dropbox uploads with other services, quickly add new files, and keep track of all your important photos, documents, and data — automatically.
Microsoft To Do is a task management app to help you stay organized and manage your day-to-day. You can use Microsoft To Do to make shopping lists or task lists, take notes, record collections, plan an event, or set reminders to increase your productivity and focus on what matters to you. Microsoft To Do makes it easy to stay organized and manage your life.