A harness with a tether that has 2 attachment points, that are short enough to keep you from going over the side. This way you don''t have to worry about climbing back aboard, which is almost impossible. The other thing is to do things slower than you would if you had crew. Try to think ahead, and be more deliberate. Remember there''s no one to cover for you if you goof up. If you are doing overnighters,try taking short naps every hour or two, even if your not tired.You can go for quite a few days like this without becoming a zombie.
Enjoy youself, the saisfaction you''ll feel is great, Marc