The unique designs on this list are customizable to your taste, plus you will have the great feeling one gets after completing a craft project.
How To Make Your Own Outdoor Cushions Tutorial:

abeautifulmess
Easy Sew Outdoor Cushion Tutorial:

confessionsofaserialdiyer
DIY Chair Cushions For Kitchen Tutorial:

inmyownstyle
How To Add Upholstered Cushions To Chairs Tutorial:

DIY Instructions Here: eatknitanddiy
DIY Pink Shibori Cushions Tutorial:

designsponge
DIY Cushions for Tiny House Storage Sectional Tutorial:

ana-white
Easy DIY Window Seat Cushion Tutorial:

mrkate
Easy DIY Outdoor Cushion Covers Tutorial:

DIY Instructions Here: youtube
Easy DIY Bench Cushion Tutorial:

homestead128
Easy No-Sew Round Seat Cushions Tutorial:

diybeautify
Easy DIY Cushion Tutorial:

liveabode
How To Make An Envelope Cushion Cover Tutorial:

heytherehome
DIY Cushion Covers for Fall Tutorial:

faeriesandfauna
Simple DIY Outdoor Chair Cushions:

brit
How To Tuftbutton Your Ikea Karlstad Cushions:

oheverythinghandmade
How To Make Your Own A Cushion Letter Tutorial:

dreamalittlebigger
Easy DIY Funny Cushions Pattern:

ohohblog
Simple DIY Round Cushion Tutorial:

createcraftlove
Easy DIY Minky Cushions Tutorial:

spoonflower
How to Sew a Washable Bench Cushion in 2 hours:

melaniekham