I have never gone solo diving as of yet and have been lucky enough to just recently find a local dive partner who has been diving for 44 years now since the age of 12. We did a couple of dives together last week and are planning a couple more next week. But like Latitude stated, with several of the dive sites having very limited to no viz, you pretty much are diving alone. Plan your dive, remember your training and don’t panic. Redundancy and the proper planning will help you out in most situations. Practice, ask questions and never stop learning.