What is the most accurate method for determining the correct spoke tension for a specific wheel and riding style, and how do factors such as rider weight, terrain, and wheel design influence the ideal spoke tension? Are there any widely accepted guidelines or formulas for calculating spoke tension based on these variables, or is it primarily a matter of trial and error? Additionally, what tools or techniques are most commonly used to measure and adjust spoke tension, and how often should spoke tension be checked and adjusted to ensure optimal wheel performance and longevity?