There are many bookmarking management tools for you to import your delicious bookmarks using Diigo, Xmarks, Firefox, IE, Google bookmarks.
Delicious alternative bookmark management here
After comparing all, i choose Diigo
How to export Delicious bookmarks
Before you do anything, you need to export all your delicious bookmarks here
Then only go to Diigo.
Step by step how to import your delicious bookmarks to Diigo.
Register an account first in order to import.
Check out Lifehacker’s review
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on Five Best Bookmark Management Tools
Delicious Replacement

You might like to take a look at Trunk.ly as well (http://trunk.ly). It takes a slightly different approach to link sharing, but we think it’s worth a look when considering options (I am biased of course!).
Happy replacement hunting,
Tim