Corporate Greeting Cards

I need ideas on making my own greeting cards (birthday cards, holiday cards etc.) I want to also use my own art on the cards. What is an easy and cheap way to make greeting cards? What type of materials etc. And also, do you have any ideas for Valentine’s day cards? Thank you in advance!

Birthday cards/ New Year cards/ Thanks cards/ Festival cards/ Marriage anniversary cards/ any other card

I need ideas on making my own greeting cards (birthday cards, holiday cards etc.) I want to also use my own art on the cards. What is an easy and cheap way to make greeting cards? What type of materials etc. And also, do you have any ideas for Valentine’s day cards? Thank you in advance!