Applying large adhesive sheets onto surfaces without bubbles / creases
What you can do by hand is fairly limited. Wallpaper is adhesive backed, but slightly repositionable. If what you have sticks strongly at first contact, your choices are limited. I would suggest the following, 


Use a roller, as wide as possible, and of rubber. This should eliminate most bubbles and creases. 
Go slow. This will allow you to catch and fix creases. 
Pull the adhesive sheet tight. 
You will probably still get bubbles, but they should be fairly small. Again, if it's a wet adhesive like wallpaper, you can usually push these out with a roller or straightedge. If it's an instant adhesive, you can prick them with a needle and collapse them. 


In industries that do lamination, its done using rollers. Web tension is a primary parameter in helping prevent bubbles and creases. It's also common to use a bowed roll to help get tension in the transverse direction and prevent trapped air that causes bubbles.