Interesting ideas

https://lastpass.com/            Store you password oneline

https://www.exclaimer.co.uk/    Email signatures managed on the cloud for office 365

http://www.clusterseven.com/    Large scale business software to monitor files to learn to they are used.  
similarly
http://cimcon.com/   manage workbooks (versioning, comparison, etc... )

Command line email for windows scripting

Organise events and meetups

https://www.eventbrite.com/

Take surveys:  
https://www.surveymonkey.com/

or
google sheets


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