interesting topic. I’ve been doing side gigs since I’ve been working. Partly for the ‘beer money’, but also because it was a fun (and paid) way to acquire skills and build relationships I couldn’t have built otherwise. All jobs below were activities on the side of my full time work.
From age 19-26 I worked as a bouncer in some boutique clubs; can’t recommend, all my friends who worked on the bar med 3x the money AND had fun. Made around 3-400 EUR / months
From age 24-29 I worked as a skydive tandem master on the weekends; this was a fantastic way to pay for my hobby (skydiving, duh), while skydiving
however a big downside was that after doing 8+ jumps/day EVERY weekend, the hobby turned into work, and with that some of the fun went away and it just become another job. Made around 3-4000 EUR / months but only during jumping season (april - sep)
Since age 30 I lecture at a university; this activity has developed significantly, and I now lead one small research department at this Uni, which means around 80+ students every year will run through my curriculum (i lecture less myself but have a pool of around 8 lecturers/experts on various topics), and approx. 22 students write their Bachelor’s or Master Thesis in my area every year; most of the time is now spent mentoring this students and advising them on their thesis. I spend 1 day/month on the weekends at University and about 1 hour per day reviewing draft dissertations and preparing comments; this pays an additional 3000 CHF / month
Lastly, I’m in the EU Commission Pool of Experts to be on Ethic Screening Panels for funding research project. This is a fantastic activity that gives me great insights into cutting edge research projects and regularly gets me in touch with experts from various different fields (nano science, robotics, AI, law, biology, IT, etc.) to evaluate research proposals from an ethical perspective. it’s not very regularly or frequent (approx. 3-4 times per year) and requires about 10 days of home prep (reading the proposals) and a 3-5 days trip to Brussels for the actual work on the panel; pays about EUR 400/day, so could even be a stand-alone gig if the frequency increases.
As a bonus, I managed to convince my employer to let me do this activity as part of my personal development, so I don’t need to take additional days off for the Brussel trips (unlike the Uni work, which happens all in my free time).
Any questions about any of this, PM me anytime.