Tackle load time from several angles for the best result.

1. Cache pages (article 168) and optimise images (article 169).
2. Minify and combine CSS/JS files (article 175).
3. Reduce plugins and remove anything unnecessary.
4. Use a fast, lightweight theme.
5. Enable Gzip compression (article 172).
6. Add a CDN (article 173).
7. Keep your database optimised (article 176).

Tip: Run a test (article 174) to see your biggest bottleneck, then fix that first rather than guessing.