Add Remember me and Forgot password in your sign in form.

Basically these two options are very important for a website that implements a membership. If they are not implemented, you should be expecting your users to email you with problems related to it. So create those options will help you automate the job; especially the Forgot password. Even though the Remember me option is not that a big problem, it may be very useful to keep your users. We all usually sign in our gmail once for a while. So that whenever you want to check your emails, you just enter gmail.com and Gmail will log you in and redirect you to your inbox automatically.