Are you taking advantage of all the Developer Programs available for software developers?
Obviously, Microsoft's MSDN is a given. If you're developing for Windows platforms (and who isn't doing something on Windows?), you should be a member of MSDN.
The other program to catch our interest recently is Motorola's developer network, MOTODEV. The site is very well done and it is obvious that Motorola is putting a lot of effort into supporting their developers. With Motorola's recent acquisition of Symbol Technologies, they are pushing the Motorola mobile vision into more areas.
And finally, check out HP's iPAQ Developer Program. We've released a Camera SDK for the iPAQ handhelds and will be releasing a Utility SDK in the next month. The SDKs are free to current iDP members.