Honestly your best bet is just going to be practice, and lots of it.
You can buy angle jig setups like the edge pro or wicked edge which are absolutely excellent and nearly idiot proof but are going to run you in the neighborhood of $250-300.
Another good system is the dmt aligner. It is similar to the edge pro and wicked edge but less refined, many people report good results.
The spyderco sharpmaker is also a very highly thought of sharpening system, but it does have its limitations. The sharpmaker requires knives have a primary bevel angle of less than 40° inclusive in order to be effective. However, if in fact your knives are suited for the sharpmaker, it can achieve some stellar results.
With all that said, I recommend learning to freehand sharpen. It's just far more satisfying than any sort of jig setup. All you really need to get started are a few bench stones in varying grits and a willingness to learn. In terms of stones, I recommend dmt diasharp stones for the coarser grits and spyderco's ceramics for the finer grits. I personally go dmt coarse -> dmt fine -> spyderco medium -> spyderco fine -> spyderco ultrafine and then finish with a strop with fine green compound. I set all of my primary bevels this way, and I set them all to roughly 25-30° inclusive so that they can be touched up on the sharpmaker.