engine won't start

Started the evening before but this morning will not crank over. Battery fairly new, lights, horn work but nothing coming out of starter. Checked fuses OK, tighten battery terminals. Any advice?

Rode home from work the other evening in 90'F weather, shut down, turned off key. Next morning starter won't turn over engine. Lights and horn but no power to starter. In neutral when I last shut it down. Relatively new battery but no start. Any advice? I've checked the fuses and tightened the...