In today's world, people don't often realize the importance of companionship until later in life. Staying fit and physically and socially active increases your odds of finding someone to date, and also increases your libido and your chances of successful sex. But, beware of too much focus on the surface, and not enough content. Such relationships quickly become empty and stressful.
Older couples have many issues to work out while dating. They are established, with clear likes and dislikes, and may have difficulty reaching agreement on lifestyle issues. They often have grown families, who may have trouble accepting a parent's or grandparent's dating. They also have relationship experience, and a widow or widower, for example, may have trouble getting beyond the previous marriage, and dealing with a different person. The media focus on youth and fitness these days can make anyone feel insecure and unattractive.
The Unofficial Guide to Dating Again, shows you how to use the "get a life" method of pursuing your interests in a group fashion. Taking classes, supporting causes, or getting involved in civic, church or social groups will keep you interested, socially connected, and give you a chance to find someone with whom you have something in common. Focus on activities that you enjoy (sports, classes, or political, social, charitable or religious activities ) which involve meeting other people and creating a social circle.
If you are doing things that are meaningful to you, you'll automatically have something in common with anyone you meet there. It will also move your focus from desperation to something productive, which will bring out your most attractive character traits. As a bonus, you also get to observe that person around other people, which will tell you a lot about his/her character. Dating doesn't happen until you are already quite sure you two are mutually compatible and interested, and success is almost guaranteed.
Why not take a look at the book - it may help you get started again!