Don't lean stored property against the walls of your unit. Whenever possible, store all boxes on wooden pallets or boards.
Don't stack boxes so high that getting to them becomes dangerous or overly time consuming.
Leave an aisle down the middle of your unit so that boxes and other items can be easily seen and identified.
Make a complete list of all goods stored. Keep sales receipts, proofs of purchase and warranties.
Take furniture apart to optimize space. Any bolts, screws or parts should be put in a plastic bag and taped to the underside of table tops.
Chairs should be stacked seat to seat with paper or cloth between them.
For heirlooms, use specially constructed boxes and utilize dehumidifiers to prevent mildew build-up.
Use protective covers.
Always use a high quality lock on your unit..
You have sole responsibility for the goods you place in storage. Check with your insurance carrier for coverage, or ask a storage consultant for a list of low cost providers. Remember: if it's worth storing, it's worth insuring.