What to bring on your observing run?

Finder charts (see IGRINS Observing Planner).
Encoder settings for PA’s if you plan to rotate IGRINS (see Rotation PA -> Encoder Table for IGRINS).
Offset box positions for offset guide stars if you plan to guide off slit during observing (found using IGRINS Observing Planner).
Offsets to nearby bright stars to check telescope pointing in faint or crowded fields (need to add to Kyle's code the option to give a small list of offset stars)
A list of nearby A0V standard stars: You can use either our A0V star TCS worklists (already uploaded to TCS for observers to use) or the IRTF Locator for Nearby A0V and G2V Stars: choose either MMT (31ºN, 110ºW) or APO (32ºN, 105ºW).
A list of targets to observe with priority and exposure times calculated for your required SNR (see SNR Estimates and Guidelines at McDonald).
Airmass Charts for all targets to help plan observations. We recommend using STARALT (keep in mind this tool does not account for daylight savings time--during daylight savings all airmasses will occur 1 hour later than the appear on the chart).
Worklists (see Worklists) if you want to have all your object coordinates uploaded to TCS without having to hand type them all the time.
A book, a show, or work to do if the weather is bad.
Snack(s) of choice (the astronomer lodge feeds us well, but it can be nice to have a special snack during observing!)
Caffeine (if not a coffee or tea drinker)! The astronomer lodge provides coffee and tea and the observing room has a coffee maker and kettle.