Reboot N150 router remotely
As you discovered, I don't believe there is one.
I went through your manual to the places I thought were appropriate, searched for (re)start (re)boot and reset, and looked at the index, but nothing.
ftp://downloads.netgear.com/files/WNR1000v2/Documentation/UM/WNR1000v2_UM_19NOV2009.pdf
I suspect that unless you get it through a firmware upgrade, you are out of luck. As a side note, what a glaring omission on Netgear's part. Really inexcusable.
A tricky workaround: Go to 'Backup Settings' then 'Save a Copy of Current Settings' then restore your settings from the file (netgear.cfg) The router will restart after restore :)
Yes. You need to enable remote administration; Choose a single IP address you will be accessing it from and then you will have full access to the router remotely. Good luck!