After I moved my printer from a super sturdy 2x4 wood table in my garage to an Ikea Lack table inside the house I noticed the table wobbles a hell of a lot while printing. Too much for my liking. So I made a simple wall L bracket.

I mounted it to the inside of the legs under the table, then anchored it to the wall. Still not as solid as I would like but it is much better.

There should be enough room away from the wall to allow for power cables and such, unless you have huge baseboards.