2 mantra's at once?

Can I do two mantras at once and have the same result? Or even 3?
ex: "Preform a reality check. Remember your dream. Stabilize the dream. Preform a reality check. Remember your dream. Stabilize the dream. Preform a reality check. Remember your dream. Stabilize the dream."
over and over again and have all 3 work?

I thought your avatar was of a swastika for a split second there. Ok anyways...

You should focus on one thing at a time, start with becoming lucid. Once you do a reality check and become lucid, then you can worry about stabilizing the dream because that's the next step. Remembering the dream is the next step after that. The focus of the mantra should be as simple as possible. Don't worry about remembering to stabilize before you even become lucid.

The mantra would be more effective as, "Remember to reality check." You can use a mantra to remember the dream once you're lucid, if you would like.

Okay, what's a nice small mantra? Is "Preform a Reality Check" good? Or should I try something else?

Yeah that's a good one. Anything short and concise like that works well. You should also make a habit of RCing every time you wake up. Many lucid opportunities come in the form of false awakenings, so you should take advantage of that.

Yes, so long as they are similar. When you hypnotize people, you don't repeat the same thing over and over again, you use a combination of related mantras, same thing here.

Well it doesn't really matter what the words are, as long as the intent is solid. I find that short and sweet mantras are good like "I lucid dream" but long ones are good too, I usually don't repeat the same mantra unless it is short, I just say random mantras mixed together, sometimes repeating them, some not, just keeping my goals swirling around in my mind and KNOWING they will happen.