(This is the continuation of Importing collected waypoints I)

Now you have a complete list with lat;lon;key;value (and maybe some more key;values).
Next step: convert the csv file to osm data. For this writeup I just wrote a small script to avoid my even more ugly oneliners and to have my efforts saved to be reused the next time I need this functionality.
so run
$ csv2osm.sh appended_lower_sort.csv > output.osm

Better save then sorry, so create a backup of the file created: $ cp output.osm output.osm.bckp

Open this file with JOSM - the easiest way is also the bash:
$ josm output.osm

Now tackle the data region by region. Do it like this:

• copy a handful of POI
• create a new datalayer
• paste the POI
• download the data for that region
• review the POI: adjust them using aerial imagery or GPS data, check for already existing objects and so on
• upload
• delete the active datalayer
• delete the still marked POI from the original datalayer you copied them from
• press ctrl-s to save your progress of wading through the data of output.osm

Go on until no data in the output.osm file is left and enjoy yourself. :)