By now, it should be clear that high-quality color management starts with the best possible monitor profile. Without accurate profiling of your monitor, your workflow will be seriously limited.
In addition, profiles for your camera are very important. There are two types of profiles;Camera generic, and specific profiles for individual cameras. Adobe’s Camera Raw 2.0 and other raw converters are carefully profiled and support generic camera profiles. Be aware that creating your own camera profiles can be very tricky, since the targets have to be shot under very controlled light conditions. There can be some significant variation between individual cameras of the same model. This will depend on specific camera brand and model.
There is actually no single profile for a printer. The profile is always for one paper, using the same ink set, printed on the same individual printer and with the same printer driver and settings (e.g. DPI) . Profiles for different types of printing paper can vary significantly. Some of the newer inkjet printer may vary very little from one individual printer to the other, but in general profiles may need to be generated for the individual printer itself.