I have a general aversion to paying for parking, so it's good that I don't often have to think about parking in Brisbane's CBD or surrounding areas. But when that need does arise those few times a year, it's a bit of an endeavour to figure out where best to park, balancing distance from where I want to go, likely availability of spaces (for on street parking options), and the costs. In the past I've used a combination of the carparking.info app or website, and google street view to look at on street parking signs. The latter is not always reliable as the information may be obscured, not clear enough to read when zoomed in, or plain outdated. This ipark map of all of Brisbane's parking meter locations would have saved me a lot of time and effort!
Another potentially useful resource is the Brisbane Parking Guide, where you can find information on parking deals and a map of (commercial) parking stations.
Brisbane recently conducted its "first comprehensive review of on-street parking management" and the report of this review and its recommendations are available (pdf) here. I've only had a brief skim, but it seems to be heading in the direction of good improvements. Part of the special offers flowing from the review is the availability of $5 evening and weekend parking at the two council operated carparks (King George Square and Wickham St). This is almost as good as the $4 offers available to RACQ members at Secure Parking locations, and the availability of such options makes a trip into the city more viable.