There are trade offs for everything in life and the tools we surf with are no exception to that rule.   With that in mind, the more knowledge you're armed with, the better to lessen the consequences.  

A softy is NOT a hard board.   Do not approach a soft board with a "hard board mentality".   They are way more flexible, have more flotation, are softer, way safer, and are typically lighter in weight.   Hard boards and soft boards each have a place in the lineup, each have their own superior qualities, each have their own drawbacks, neither board type can do it all.    There are times when ONLY a hard board will do - and vice versa!  

A soft hybrid kneeboard is a high performance surf craft – respect it (and the beach and waves, too) and it will last for a far longer time than if you abused it (it's not a beach sled, skimboard, beach chair or shade from the rays).  

Keep soft boards away from heat sources.   Yes, the sun included – keep it in a board bag or under a towel when on the beach.   Exposure to the sun in a locked car will insure heat bubbles and delaminations - guaranteed.

Salt "ages" and breaks down plastic – wash down your board with fresh water after a surf session.

Repair dings, cuts and abrasions ASAP.   Best tool for that job is a mini-glue gun, sold at department and craft stores.   Make sure the area to patch is DRY and clean, squirt in some goop (you can level it with a wet fingertip).   Almost instantly ready to surf!   You can take along a coupla sticks of hot glue and a butane lighter whenever you're on safari for a quick fix right on the beach – just flame the stick end and let it drip into the ding.   Be Advised: if you use surf wax for a "quick" on-the-spot fix you will probably not be able to repair the ding properly with hot glue or contact cement!!

Soft boards and creases are nearly inevitable, specially if you surf hard.   Slick bottom creases do not noticeably detract from board performance.   If you must, you can usually "fix" those creases by lightly sanding the crease itself with some 100 grit sandpaper and use your hot glue gun to "fill up the trough".   A credit card works well as a glue leveler.