Hammer Ons and Pull Offs are excellent ways to nail solos. If you see a note with a smaller note coming up after it, that indicates you can Hammer On.
For guitar solos (where the background for the notes turn blue and a percentage meter appears) on the Fender Stratocaster guitar only, use the Solo buttons (the small ones near the body of the guitar). Instead of strumming, simply tap the buttons as the note passes the bar. This making solos with many notes very easy. Note: You may want to use the included guitar strap to keep one hand on the regular fret buttons and the strumming hand on the solo buttons.
If your band fails a song in Band World Tour mode, unplug one of the wired instruments. Using a different instrument, select "Return to Main Menu". When you continue the career your band will not have lost any fans.
Precise timing is required for this trick as doing wrong will cause you to fail faster than not strumming at all. Play the notes as if it was a double note instead of a triple note. You must strum up and down at a constant rate in order to do this successfully. You must play the solo as usual, but afterwards the rest is easy. You should get at least a 90% on the song if you get 60% on the solo and do well afterwards.