If you don't have a Gibbon Slackline set like the one shown by Frankie, you can still set up a slackline using a "primitive rig" as shown by the fine folks at OutdoorGearLab.com below:
(That looks like an awesome climbing gym where he's setting that up!)
Now, what if you don't have great anchor points like those shown in the video? If your yard is absent of trees and you don't have regular access to a park with properly spaced trees you could consider using an anchor rig like this:
I know, not the easiest thing to just set up and tear down. And if you're not ready to do high flying tricks, you might not need the height and bounce that Frankie is getting from his set up.
If you're a beginner and still challenged by regular set up between two trees on the Gibbon Classic line (not the Jibline or Surfline), I'd recommend a Gibbon Slackrack. Because of it's short length and the way the line lies flat on the pins, you'll find that the Slackrack has less bounce than even the Gibbon Classic. If you're put off by the $300 price tag, you'll be happy to know it can often be found at either the Clymb or LeftLaneSports at about $200, often less, and if you get regular e-mails from those sites, you may eventually get a coupon code for 20% or 25% off. I managed to buy a Slackrack for around $150 (if you need help navigating the site, check out the article, "Slackline Bargains" on this site.