General resume writing tips

These days you can write your resume in the first person (i.e. I have) or the third person (i.e. he/she has). However, you do not need to use 'I', 'he' or 'she' in a resume because its use is implied.
Do mention things you are good at, but do not go over the top. You can oversell yourself.
Don't mention things that you are bad at or say negative things about yourself in your resume.
Make sure that the resume you write conjures up the right image of you and your skills, capabilities and achievements. If you do not match the picture you have painted with your resume at the interview, then your application will not be taken further.
Be careful when you use abbreviations - they can be misunderstood.
If you are not happy with your resume or you only seem to get rejection letters then please get a professional resume writing service to write it for you. Yes, you will have to pay for it. But, it could save you a lot of time, lead to you getting less rejection letters and hopefully you should get an interview that much quicker.