Keeping users logged in, membership 2 or ultimate branding? How?

I noticed that the links in an article on wpmu about keeping users logged in eternially went to the Ultimate Branding plugin, which I had been planning to utilize on our website. I also run Membership 2, which is used for our members to log into the community.

My goal is to make it so that they login and never have to login again, as many are complaining about that when using their phones.

What would be the advised direction for me to take to accomplish this given that I use Membership 2 and Ultimate Branding?