If you're on an older Crown model: When you're driving at ground level, raise your platform high enough that you can see the front corners of the base. Makes driving and navigating tight areas much easier (Also easier to gauge from close/far from the rack you are).
If your order picker doesn't have plexiglass on the roof, you can scan the pallet ID through the roof slats while waiting for the platform to rise. Similarly, if the next location is in front of you can scan through your front window (if it's clean enough, that is
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If you're picking in the waterfall racks (rack aisles with 10+ levels storing XS-sized freight), check the next couple of locations you'll pick. Oftentimes, you'll pick two or three locations right next to each other without even having to move.
I used to haul ass for the first half of shift, get my numbers up really high, then 'come in for a soft landing' for the second half, but these days, the labels are good enough that you can make decent prod just going at a moderately fast pace all shift.
Above all, like anything in life, it takes time and practice to get good at operating the equipment and the job functions. There's also zero expectation for you to hit your production numbers for the first few weeks. It's all about learning the equipment, job function, safety and following best practices. So take your time, and the prod will come to you. Good luck.