1. It would be good to export all activities to CSV, rather than just a page of 20.
2. It would be good also if more activities could be displayed on the one page (veloviewer allows up to 1000).
3. How about a backup of all activities?
Chunkywizard, Strava has a nice default naming scheme, with the current date + city where you performed the activity. Garmin shows "Untitled" by default...
I edit all my activities and name them simply "YYYY-MM-DD - <some descriptive text>". For today, for example, it would be "2014-02-28 - Fartlek with wife". This helps me, but exporting that type of name might cause issues on some operating systems that doesn't do well with spaces on file names (most common OSes do, though...).