What are some tips and tricks to use a hotel iron or steamer effectively?

Upon hotel arrival, prioritize checking the iron or steamer for damage, rust, or dirt to avoid garment mishaps. Ensure cleanliness and functionality; request a replacement if needed to maintain clothing integrity.

Definitely this. And don't use even a clean-looking hotel steam iron without a test run in case the jet holes have a build up of brown, deep-staining gunk trapped in them (bitter experience with a white evening dress shirt taught me this lesson..).

Opt for distilled water over tap water in your iron or steamer to prevent potential stains and damage caused by mineral deposits or chemicals. Distilled water ensures purity and enhances garment care. Purchase it from a convenience store or pharmacy, or inquire with hotel staff for availability.

Hang garments in the bathroom during a shower to diminish wrinkles: steam from hot water relaxes fibers for easier ironing or steaming. Ensure adequate space between clothes and walls or shower curtain; avoid extended exposure to prevent dampness.

I've done this in the past to try and get the smell of smoke out of clothes on trips too (I don't want to pack even dirty clothes that make the rest of my stuff stink)

Tailor settings and techniques to garment type and fabric when using the iron or steamer. High heat and pressure suit cotton and linen, while silk and wool demand low heat and delicate strokes. Adhere to care labels and instructions diligently. Avoid ironing or steaming over buttons, zippers, or embroidery to prevent device or garment damage.

Employ a towel or cloth as a protective barrier between the iron/steamer and your clothes, especially for uncertain heat or delicate/dark fabrics. This prevents scorching, shining, or sticking and minimizes direct device contact. Ensure the towel/cloth is clean, dry, and not used excessively to prevent moisture absorption and steam retention.

Allow clothes to cool and dry fully post-ironing or steaming, either on a hanger or a flat surface, before wearing or packing. This ensures shape retention and minimizes new wrinkles or creases. Optionally, spritz with starch or wrinkle releaser for added crispness and freshness.

Hang your stuff up when you arrive somewhere so you can keep any ironing to a minimum! You're more likely to have an iron than a stable ironing board in a hotel room (at least in Europe or Asia) so a folded towel on the desk can be the solution.