in my public speaking class, i practiced my speech about 6 times once. also, i agree with kirupa, time flies.
[ot]
[joke]close microsoft[/joke] sorry to say, but i am really mad at the registry editor and microsoft for that case… 
[/ot]
please try to think about the following things:
-in a 10 minute speech, how long should your intro be?
in my public speaking class, i always started with something that would get the audience’s attention. in the intro, you have to tell the audience, in a nutshell, what you’ll say…
-how long should your conclusion be?
you have to, in a nutshell, say what you told them in the body.
-once you’ve thought of the things above, how much time will you have for the body?
will you be able to cover all the 5 things you originally listed in that much time?
i hope this helps, and please ignore the joke above. 
edit: the following was our evaluation form:
**[FONT=Times New Roman][SIZE=4][LEFT]Critique and Evaluation Form[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=2][LEFT]
Speaker: ___________________ Topic: _________________________ Time: _____________________
Ratings: [/SIZE][/FONT]*[FONT=Times New Roman][SIZE=2]5-6 = Not Satisfactory 6-7 = Fair 7-8 = Average 8-9 = Good 9-10 = Excellent[/LEFT]
*[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]
INVENTION [/SIZE][/FONT][FONT=Times New Roman][SIZE=1](30 points possible)[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]-Inartistic[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]–Appropriate use of credible and 5 6 7 8 9 10
objective supporting material
–Complete and ethical use of sources 5 6 7 8 9 10
and citations (4)[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]-Artistic[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]–Effective use of persuasion 5 6 7 8 9 10[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]
ARRANGEMENT [/SIZE][/FONT][FONT=Times New Roman][SIZE=1](80 points possible)[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]-Speech organization appropriate to topic,
purpose, and occasion 5 6 7 8 9 10[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]
-Introduction[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]–Gain attention and reveal topic 5 6 7 8 9 10
–Establish credibility and
preview main points 5 6 7 8 9 10[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]
-Body[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]–Main points balanced, well-organized 5 6 7 8 9 10
and support Specific Purpose
–Effective connectives 5 6 7 8 9 10[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]
-Conclusion[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]–Signal end , provide summary, central 5 6 7 8 9 10
idea, call to action (if appropriate)
–Preparation outline contains all
essential elements 5 6 7 8 9 10
–Complete and accurate annotated
bibliography 5 6 7 8 9 10[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]
STYLE [/SIZE][/FONT][FONT=Times New Roman][SIZE=1](20 points possible)[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]-Effective use of language (oral style) 5 6 7 8 9 10
-Effective use of ornamentation 5 6 7 8 9 10[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]
DELIVERY [/SIZE][/FONT][FONT=Times New Roman][SIZE=1](50 points possible)[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]
-Verbal[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]–Appropriate use of pauses 5 6 7 8 9 10
–Appropriate rate and volume 5 6 7 8 9 10
–Appropriate vocal variety 5 6 7 8 9 10[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]
-Nonverbal[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]–Natural gestures and movement 5 6 7 8 9 10
–Appropriate eye contact 5 6 7 8 9 10[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]
-MEMORY [/SIZE][/FONT][FONT=Times New Roman][SIZE=1](20 points possible)[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]–Suitable use of notes/outline
during delivery 5 6 7 8 9 10
–Speaker’s outline: complete and
appropriate level of detail 5 6 7 8 9 10[/LEFT]
[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]
TOTAL POINTS ______________/200[/LEFT]
**[/SIZE][/FONT][FONT=Times New Roman][SIZE=1][LEFT]
Met time requirements (6-8 minutes)? Yes No
Annotated bibliography included? Yes No
Speech delivered extemporaneously? Yes No
Appropriate use of formal language? Yes No
good luck. :)[/LEFT]
[/SIZE][/FONT]