I either use wooden crates & fill with shred & wrap with cellophane or cover a sturdy box & pack with shred, scrunched tissue paper - these are more food themed hampers.
For other hampers I use different things eg - have done a wheelbarrow packed with gardening gloves, seeds, tools, magazine, twine, plastic pots, garden clogs, canes, plant book, mug & cellophaned it all (did buy a huge amount of cheap cellophane !)
Have done a mixing bowl inc whisk, cutters, rolling pin, apron, oven glove, etc
Others: kept a posh lidded box & filled with tissue paper & then filled with make up brushes, lip balm, eye make up remover lotion, trial sizes etc & a teenage magazine + store voucher for friends DD (14) & wrapped box with big fancy wired ribbon bow.
Have this year bought some of the B&M initial stockings - for my friends DD intend to fill her with make up bits & bobs inc mascara, eyeliner from brands she loves & then in a card inside put some money so she can buy something herself that she chooses
For arranging - for me I usually sit in the clear area of my hallway & arrange a couple of different ways to see what looks best. I like using shred or tissue paper - have used a scarf once to line the "crate" as that was part of the gift - I like using irridiscent cellophane or plain but really covering it generously & I seal with twine, ribbon or rafia - sometimes I add decorations to it, depends who the recipient is.