There is no one best way to lock your bike. However, there are a number of very bad ways to lock your bike that are guaranteed to get it stolen.
I’ve written a pretty exhaustive article on how to lock a bike where I go over all the acceptable ways and all the ways you should never lock your bike. If possible, you should read this before you make a final decision on a lock.
There are secure locking methods that you probably didn't know existed or thought weren't valid ways to keep your bike safe.
Knowing all the appropriate techniques could help you choose a more user-friendly lock, as there may be valid locking methods that allow you to use a smaller and lighter model!