I agree with TexasBowHunter, but sometimes you can't always shoot to practice. For example, you're moving in town. Where are you going to shoot everyday? At the indoor range for $6.00 a pop? Shooting everyday will add up to $168 a month. Too pricey for me. This is what I do at the start of the season.Just take your bow inside. You can do one of two exercises:

1. Pull the bow back to shooting position in sets (do not dry fire). Don't worry too much about form. You're just looking to build endurance. At the same time don't just starting ramming your arm back and sacrifice all the practice you've put in.

2. Draw your bow back and with proper form look through your site. Follow lines in your house. Start with straight lines then work toward objects with curves. The point is to have the bow drawn for extended periods of time. Or you can simply pick a stationary spot, draw, and aim for 10 seconds and build up to higher times.