Money mistakes to avoid after death of a spouse

Dear Dr Pesa,

I am a 32-year-old mother of two and I have recently been widowed. My late husband and I ran several businesses together and made investments which brought in fairly good returns. We have plenty of savings to cushion us for a while, but I'm worried about spending it the wrong way. My husband was the one who mostly handled the money, businesses and investment. I don't want to make mistakes. Please help.