I have constructed advanced fighter-jets, mind control devices, a weather control device, a teleportation device, robots, clones, a working Transporter device from Star Trek, time machines, a Multiverse Transporter, a shrinking pod, as well as an assortment of guns including lasers, rocket launchers, and crossbows.
I do this by combining MATLAB and skills I acquired while doing my MSc. in Electrical Engineering.
As of February 1st, 2015 I'm attempting to go
1 month , 2 months , 3 months , 4 months, a long time without posting stuff on Stack Overflow. Why, you ask? Because I can relate to this post (only it's the main site). I will however allow myself to ask and answer on other SE-sites.
Update: After 4 months, I no longer feel the urge to check SO, as I know I won't answer, vote to close, give up and down votes etc. As Randall Munroe put it:
Mission. Fucking. Accomplished.