This isn't how you should write a bass line

http://www.ultimate-guitar.com/lessons/bass_lessons/how_to_create_a_bass_line_for_a_song.html

Boy what a lesson. Anyone can do easy octaves and root notes… UG should just stick with guitar

You must have reached the intermediate stage Link, cos now you are dissing people who are where you were two years ago

this thread might be a good starting point for us to describe how we come up with bass lines.

haha thats a good way of putting it but explaining that to a newbie isn't really helpful. try to deconstruct your way of creative thinking and you might get some new insights. I know I do when I try to decompose my thought processes when coming up with music.

I dont know if Progreesions have ever been mentioned but here we go. When coming up with a song its easy to come up with a Key but what about the other chords in the song, an essential tool is ‘Progressions’. Early Rock N Roll borrowed Blues Progressions, a good example being ‘Johnny B Goode’, { remember Marty McFly in Back to the Future telling the band, “OK, this is Blues in B, watch me for the changes and try and keep up”{{he then played Johnny B Goode in 1955 on a Gibson ES 355 which was introduced at the 1958 NAMM show}}. }
When he said Blues in B the band knew that meant, B,E and F from the 1,4,5 Blues progression, Puzzled yet?
OK, take a piece of paper and write 1 2 3 4 5 6 7 across the top, then under the numbers write;
A B C D E F G
so now yo can work out the chords for a song in the key of A with the 1 4 5 progression, 1 being A, 4 being D and 5 being E. So what if your song is in the key of C? simply move the letters to the left until C is below 1 and put A and B at the end 1 2 3 4 5 6 7
C D E F G A B thus, so in the key of C with a 1 4 5 progression the other two chords are F and G. You dont have to use 1 4 5 either, try 1 6 5 giving you, C A G. Hope this helps