There are a gazillion lock screen apps available on Google Play, but the majority of them are subpar and not worth your time. However, in my opinion, there is definitely one out there worth your time—one that constantly learns and adapts to what apps you use when and where to determine which shortcuts to give you.
The app in question is called Cover Lock Screen (whose company, Cover, was just purchased by Twitter). Though still in beta mode, it's accessible to anyone who wants to download it on Google Play. It's extremely convenient, and might just be the fastest way to get the apps you want... more