The laptop you were supposed to set up first

Buried a few paragraphs into the registration confirmation, past the agenda and the hotel block, sits a short paragraph easy to skim past: bring a laptop with this software installed, this license activated, or this vendor sandbox account created in advance. Most attendees read it once, mean to deal with it, and don't — on the reasonable-sounding assumption that the facilitator will have a workaround, or that IT will sort it out quickly enough once they're actually in the room. A hands-on course built around live, on-device exercises doesn't reliably wait for one latecomer's install screen, and the workaround is usually smaller than people hope.

The paragraph that isn't the agenda

A course's technical requirements usually live somewhere other than the public agenda page — a line in the registration confirmation email, a separate joining-instructions document sent closer to the date, or a short FAQ section easy to miss on a first read. The structural tells that mark a discussion-based workshop are about headcount and format; a hands-on technical course adds a second, different tell worth watching for specifically: any mention of software, a platform, or an environment attendees are expected to arrive with already working, not something the room provides.

Corporate IT is the actual obstacle

The instructions are rarely the hard part — running them against a managed corporate laptop usually is. No local admin rights to run an installer. A security policy that blocks an unfamiliar executable outright. A VPN or proxy that won't reach a vendor's sandbox environment from outside the office network. None of these show up by reading the joining instructions twice at your desk; they show up the moment you actually try to follow them, which is exactly why trying matters more than reading.

Test it before you leave, not when you arrive

A facilitator running a room of thirty people through a live exercise can't reasonably stop to troubleshoot one attendee's blocked installer without stalling everyone else who came prepared. Do the dry run days before travel, not the night before and certainly not in the hotel lobby that morning: install the software, activate the license, log into the sandbox, and confirm the exact exercise the course description mentions actually opens. A setup that fails at your own desk with IT three doors away is a solvable problem. The same failure in a conference center, after a flight, with the session already starting, usually isn't.

When the instructions don't say enough

If a listing mentions a hands-on component without specifying what, exactly, an attendee needs to bring or configure, that ambiguity is worth a direct email to the organizer before you register, not an assumption you carry to the venue. Ask what software, which version, whether a license is provided or must be your own, and whether the exercise environment needs anything from your network beyond a browser. It's a small question that saves a full day's exercise, and most organizers running a genuinely hands-on course would rather answer it in advance than watch someone sit out the one part of the program they came for.