Will? Unnecessary.

"i WILL make it!"
"i WILL pass my test!"
"i WILL win this time!"

Stop using WILL and reminding yourself that you can't. Why?

When you say "i WILL", aren't you reminding yourself that you've tried that previously and failed, or simply can't do it, that's why you need a resolve to motivate yourself?

Seriously, JUST DO IT. jfdi. =)