You can easily copy or duplicate a Membership Level ready for the next year or next season.
Head to Memberships > Membership Levels > Click the Membership Level you want to copy > Scroll to the bottom of the page and click the 'Duplicate' button.
Once you have created a copy you will need to make the appropriate edits such as renaming the Membership Level and editing the Groups that you will automatically drop these Contacts into.
Note: remember to make the old Membership Levels (e.g. 2013 Member) 'In-Active' so they no longer show up on your public pages.