Do you know about memrise.com? Register there and start learning flashcards. It's free. And not boring. Many people become memrise addicts after a week of constant using it.
For smartphones you can use Anki. It also has Lojban sets.
Here are the links for learning Lojban.
✔ http://www.lojban.org/tiki/wavelessonscontinued - is a popular textbook
✔ http://dag.github.com/cll/ - is the full textbook
✔ http://vlasisku.lojban.org/ - is the dictionary
✔ http://www.memrise.com/topic/lojban/wordlists/ - is a great place where you can learn lojban words online. Just *register* on that website, try several courses and use the one that you like most
✔ http://lojban.org/jboski - automatic grammar check of what you write in Lojban (which is unique among all languages!) with English glossing (i.e. translation).
✔ http://camxes.lojban.org/ - Even better than the previous item. But without glossing.
✔ https://groups.google.com/forum/#!forum/lojban-beginners - a community this is where you can ask any questions.
✔ http://webchat.freenode.net/?channels=ckule,jbosnu,jbopre,lojban is a chat where you can make friends and ask for help for learning lojban (in #ckule section)