Vitamin K doesn't help a platelet disorder, but it has some benefit if you have a deficiency. Avoiding things like garlic, aspirin and NSAIDs help curb bleeding.
There is a formula called RICE (Rest, Ice, Compression, Elevation) that they tell you to practice when having any type of bleeding. The elevation is only for bleeds below the heart such as in the legs.
Otherwise, following your doctor's orders for treatment is all that you can do, other than genetic counseling.